With Carrie Underwood not nominated this year for Entertainer of the Year at the '46th Annual Academy of Country Music Awards' (Sun., 8PM ET on CBS), her back-to-back winning streak was coming to an end. So the big question of the night was who would take home the prize. Especially as all five nominees had never taken home the honor before.

But that wasn't the only surprise, as there were several great performances, including a medley duet by former 'American Idol' winner Underwood and fresh-faced 'Idol' judge Steven Tyler.

He first joined her on-stage for her hit 'Undo It,' but soon they broke into Aerosmith's signature song 'Walk This Way,' where Underwood reminded us of that great rock edge her voice has.

It was a big night for Lady Antebellum, Miranda Lambert and Carrie Underwood at the 45th annual Academy of Country Music Awards (Sun., 8PM ET on CBS). Nominated for seven awards, Lady Antebellum took home three: Top Vocal Group, Single Record of the Year and Song of the Year for "Need You Now".

Watch the video after the jump.

• Travel Channel has a new Man vs. Food marathon all night.
• Discovery has a Who Was Jesus? marathon all night.
• At 7, CBS has a new 60 Minutes, followed by the Academy of Country Music Awards.
• NBC has a new Dateline at 7, then new episodes of Kings and Celebrity Apprentice.
• At 8, FOX has a new episode of The Simpsons.
• Food Network has a new Challenge at 8.
• Also at 8: HBO has a new No. 1 Ladies' Detective Agency, then the season premiere of In Treatment (two episodes).
• At 9, PBS has a new Masterpiece Classic.
• Showtime has the season premiere of The Tudors at 9, then a new United States of Tara.
• MTV has a new Rob Dyrdek's Fantasy Factory at 9, followed by new episodes of Bully Beatdown and Nitro Circus.
• At 10, AMC has a new Breaking Bad.
• At 11:45, Cartoon Network has a new Aqua Teen Hunger Force.
• At 1AM, Cartoon Network has a new episode of The Mighty Boosh.

Check your local TV listings for more.

• At 8, CBS has the Academy of Country Music Awards.
• NBC has a new Dateline at 8.
• FOX has a new American Idol at 8, then a new House.
• The CW has the series finale of Gilmore Girls at 8, then a new Veronica Mars.
• TNT has an NBA playoff game at 8, followed by another.
• At 9, PBS has a new Frontline.
• Discovery has a new Deadliest Catch at 9.
• At 10, NBC has a new Law and Order: SVU.
• Food Network has a new Throwdown with Bobby Flay at 10 (after three repeats - it's a mini-marathon).
• Bravo has a new Work Out at 10.
• There's a new ECW on Sci-Fi at 10.
• Also at 10: FX has a new episode of The Shield.

Check your local TV listings for more.