Lady Gaga is going to make little monsters out of 'The Simpsons.' The pop sensation will be stopping by Springfield in 'Lisa Goes Gaga,' EW reports.

After learning the fictional city is filled with low self-esteem, Gaga tries to cheer up Lisa with a song and a flash mob. In addition to some Lisa interaction, Gaga will have a variety of wardrobe changes and share a smooch with none other than Marge Simpson.

"I would say this is one of the coolest things I've ever done," Gaga told EW about her guest spot. "My dad's probably going to do 80 backflips when the episode comes out."

The episode is set to air in the spring of 2012.

In other casting news ...

The battle between Margaret Cho and Bristol Palin continues -- online. Whether intended or not, Margaret launched a media firestorm on Nov. 29 when she blogged that fellow ex-'Dancing With the Stars' competitor Bristol appeared on the dance-competition show only for her mother's political gain.

Margaret later clarified that she was merely commenting on rumors and, though she doesn't agree with the family's politics, she likes Bristol and thinks "she's a cool person." Bristol then fired back with a lengthy blog post on Facebook.

The panelists on 'Chelsea Lately' (weeknights, 11PM ET on E!) seemed genuinely impressed shocked by the essay's eloquence but took issue with the odd gay joke (jab? insult?) Bristol tacked on the end.

Neil Patrick Harris announced yesterday that he and his longtime partner David Burtka are expecting twins. Chelsea Handler read out the actor's Tweet on 'Chelsea Lately' (weeknights, 11PM ET on E!): "'We're super excited/nervous/thrilled. Hoping the press can respect our privacy...' Oopsy," said Handler.

All this baby talk got panelist Ross Mathews thinking about having his own "gayby." He explained, "My biological clock is ticking. And my Salvador and I -- we're not sure when we want to get one of those babies. But we're waiting for a sign, like if my piano bar suddenly has a day-care."

The hostess then inquired as to whether he'd be willing to have sex with a woman to get her pregnant. Check out his response.

We'd like to have Ross Mathews' brain for a day, just to see what it's like to be so happy all the time. He was having a blast interviewing stars on the red carpet at the Oscars for 'The Tonight Show With Jay Leno' (weeknights, 11:35PM ET on NBC).

And the stars didn't quite know what to think of him either, or maybe they were just trying to think of something equally witty to say. The look on Robert Downey, Jr.'s face when Matthews suggested he play him in a movie was priceless.

Watch the video after the jump.

A gossip quiz wasn't the only thing that Jay Leno and Chelsea Handler battled about last night. Leno also teased her about the age difference between her and boyfriend Ted Harbert (the E! chief - I guess they got back together?), Handler insulted Leno by comparing him to another talk show host, and then Leno showed the new Playboy that features Handler on the cover.

After the jump, Leno and Handler continue the battle.

Rumors continue to fly as more and more people speculate who will take over Rosie O'Donnell's spot on The View. I haven't paid much attention to the ever-expanding list, but the two most recent names managed to catch my eye: Mario Cantone from Sex and the City and Ross "the Intern" Mathews from, most recently, Celebrity Fit Club. The View has always been about showcasing varying women's points of view, so how do Cantone and Mathews fit in there? Are they possible candidates just because they're gay men? Come on.