Whoopi Goldberg has been married three times -- once in the '70s, once in the '80s and once in the '90s. Appearing on 'Piers Morgan Tonight' (weekdays, 9PM ET on CNN), Goldberg made a surprising disclosure about each relationship.

"Do you think you were in love with all your husbands, any of them?" Morgan asked Goldberg. She responded immediately: "No." So why did Goldberg get married all those times?

Barack Obama's sister Maya Soetoro-Ng was on 'Piers Morgan Tonight' (weekdays, 9PM ET on CNN), where she unsurprisingly only had nice things to say about Obama as both the President and an older brother. So Morgan tried to throw her off her script, asking whether there was something Obama could improve.

"If you were being critical, if you were giving him a halftime report," Morgan wondered. "What would you say, 'Go on, you could do better here.'"

"Well, I would say that he needs to be more cheerful when he loses to me in Scrabble," Soteoro-Ng answered.

Robert Redford will always be associated with Paul Newman because of their roles together in the iconic films 'Butch Cassidy and the Sundance Kid' and 'The Sting', and because of their long-time friendship.

Redford reflected upon Newman, who died in 2008, on 'Piers Morgan Tonight' (weekdays, 9PM ET on CNN), telling a story about the time a man in a restaurant confused Redford for Newman.

"I was at a table in Napa Valley," Redford told the host. "And the table next door was making all this fuss, and I could tell they were looking at me, and they were going to come over and say something."

Eva Longoria appeared on 'Piers Morgan Tonight' (weeknights, 9PM ET on CNN) and spoke on camera about her divorce from basketball star Tony Parker for the very first time.

"What was it like for you when it all exploded, when it all came out, when ... the fairytale was suddenly hit by this hammer blow?" asked Piers Morgan.

Tyra Banks was on 'Piers Morgan Tonight' (weekdays, 9PM ET on CNN) and the talk -- about skinny models and men being brainwashed to think that's what thy want when, biologically, they want to feel softness next to them -- turned to breast augmentation.

Banks told Morgan about her early days as a model, when magazine covers showed off her assets. People thought she had fake breasts, so to prove that they're real, she once exposed them to the studio audience on her talk show, before having a doctor run a sonogram over them so they could be declared implant-free.

Simon Cowell was on 'Piers Morgan Tonight' (weekdays, 9PM ET on CNN), where he discussed an incident in which a man he had just met in a Los Angeles restaurant offered a large amount of money if Cowell would judge the man's bedroom performance.

"He offered me, I think it was, 150 grand to criticize him boinking his wife," Cowell explained. "Now the crazy part of the story is I said no."

"Why wouldn't you do that?" Morgan wondered

"I don't know," Simon responded, seeming genuinely perplexed. "If you're watching, I'll even do it for $50,000."

During his appearance on 'Piers Morgan Tonight' (Weeknights, 9PM ET on CNN), proud conspiracy theorist Jesse Ventura offered up an explanation as to why the U.S. and its allies are still fighting in Afghanistan, which Piers Morgan found highly unlikely.

"Do you want to know why we're in Afghanistan?" Ventura asked Morgan, before telling him.

"It came to me six months ago when a story came out that they found a vein of lithium there that they say is worth a trillion dollars," Ventura explained. "Now, what is lithium used for? Every cell phone, every computer, and soon to be electric cars."

Sarah Silverman was a big backer of Barack Obama during the 2008 election, and because of that support she recently got to meet the President.

As the comedienne told 'Piers Morgan Tonight,' (Weeknights, 9PM ET on CNN), she ended up making their encounter awkward by saying something "so lame" that she wanted to grab it and put it back in her mouth.

What happened was that Obama asked her "What's next for you" and Silverman responded by blurting out "I'm going to be naked in a movie!"

After laughing hysterically at Silverman's retelling of her gaffe, Piers Morgan wondered how Obama reacted to it in real time.

Three years ago, Dwayne "The Rock" Johnson divorced his wife of 11-years Dany Johnson, who was also his manager. She remains his manager to this day, and Johnson told 'Piers Morgan Tonight' (Weeknights, 9PM ET on CNN) about how he was able to go through a rough divorce and then come out with a great, loving relationship with his ex-wife.

"There's a period when we went through a lot of sludge," Johnson explained to Morgan. "I was very fortunate that I had her, who had the wherewithal to say 'Okay, we're going to go through this and it's terrible, but there's somewhere on the other side, if we come out of this, that we're going to become better'."

Rod Stewart obviously spends a lot of time thinking about sexiness -- after all, he is the guy who famously posed the musical question, 'Do Ya Think I'm Sexy?'

As Stewart told 'Piers Morgan Tonight' (Weeknights, 9PM ET on CNN), his charmed rock star lifestyle has helped him develop a pretty specific idea about what makes a woman sexy.

"I've been out with women who've been 'Playboy' center-spreads. Absolutely gorgeous features, but no sex appeal," Stewart explained.

"What to you is sexy?" Morgan wondered.

Tuesday's 'Piers Morgan Tonight' (Weeknights, 9PM ET on CNN) was a special edition about Twitter, in which 'New York Times' columnist and foreign correspondent Nicholas D. Kristof explained how the microblogging network has been keeping dictators in the Middle East in check during the anti-government protests that have been sweeping through the region.

Kristof explained how when he was covering the uprising in Egypt last month, and he saw pro-Mubarak "thugs" out among the protesters, he would immediately tweet "Mubaraks thugs out here holding clubs with nails, better look out."

"You can likewise take a picture of the person, and then Twit Pic it," he continued. "So then there's a photo of that person going out, and it enormously raises the cost of repression for regimes."

On 'Piers Morgan Tonight' (Weeknights, 9PM ET on CNN) gem experts John Block and Prince Dimitri of Yugoslavia discussed Elizabeth Taylor's $150 million jewelry collection, making the point that she was able to acquire almost all of it through gifts.

"Did Elizabeth Taylor ever buy jewelry herself, or was it always given to her by admiring men?" Morgan wondered.

Block answered that Taylor had told him the only time she had ever bought jewelry was during the Duchess of Windsor auction, when she bought only one piece of jewelery that she kept.

Actress and author Carrie Fisher became Elizabeth Taylor's step-daughter when Taylor married Fisher's father, singer Eddie Fisher. Although Taylor and Eddie Fisher divorced when Carrie Fisher was eight, she maintained a close relationship with Taylor, who died Wednesday at age 79.

Reflecting upon her step-mom, Fisher told 'Piers Morgan Tonight' (weekdays, 9PM ET on CNN) about a "double date" she went on with Taylor, Michael Jackson and Shirley MacLaine.

"No one noticed Shirley and I," Fisher quipped, after laying out one of the few scenarios in which she and MacLaine would be anonymous.

Like many of the luminaries Piers Morgan had on during the hour-long remembrance of Taylor, Fisher mentioned how kind and dedicated Taylor was to her friends, and spoke about the empathy the two-time Oscar Winner had for all those who were suffering.

Fox News reported Monday that Libyan leader Muammar al-Gaddafi had used journalists from CNN and Reuters as human shields by inviting them to inspect damage to his compound. According to the report, British forces were forced to call off additional fighter jet attacks because the journalists were there.

On 'Piers Morgan Tonight' (Weeknights, 9PM ET on CNN) CNN's Nic Robertson, who was in Gaddafi's compound when this allegedly happened, lashed out at Fox News's reporting on the issue, calling it "Unimaginable, hypocritical, irresponsible, outrageous."

Robertson then disputed Fox News's position that they hadn't sent any of their employees to the compound because they suspected they would be used as human shields. According to Robertson, there was in fact somebody working for Fox News in the compound with him.