The stars came out for Justin Timberlake's 'The 20/20 Experience' record release party, sponsored by iHeart Radio and Target and held at the El Rey in Los Angeles last night (March 18).

JT and his pal Ryan Seacrest were dressed in their suits and ties, and snazzy shoes, while the ladies were ensembled up in mixes of casual and party fare. Jordin Sparks was sexy in black leather leggings, while Victoria Justice dazzled in her shimmery, silver frock.

Here's the guest of honor, throwing the camera a grumpy stare, in a joking way, of course.

David Livingston, Getty Images

And here's the suit and tie duo, looking dapper. Nice threads, gents!

David Livingston, Getty Images

Sparks looked totally hot. Like wow, right? Everything about her outfit worked -- the chunky bracelets, the criss-cross top and those liquid leggings.

David Livingston, Getty Images

Justice was a vision, wasn't she? We can't tell what's shinier -- her frock or her hair. But that youthful cut of the dress is perfect for her body and the swingy cut in her hair is just right for her locks.

David Livingston, Getty Images

JoJo was in the house and in all black. She's so adorbs, although the black ski cap made her look like she's about to commit a burglary.

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It's not a party until the Wanted show up. Siva Kaneswaran, Nathan Sykes and Tom Parker represented the boy band at the fete, in sneaks, too!

David Livingston, Getty Images

Seacrest looked like he was in a good mood, despite the rumored split with Julianne Hough. He is always well-dressed.

David Livingston, Getty Images

Emmy Rossum is largely known as an actress -- see her on Showtime's 'Shameless,' where she regularly noshes on the scenery. But she is working on music, too! We love how she matched her eye shadow to her embroidered Topshop dress -- mint green is so her color.

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Former 'American Idol' contestant Paul McDonald and his wife, 'Twilight' actress Nikki Reed, are still as in love as the day they met. What a well-matched pair they are.

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Watch the Justin Timberlake 'Suit & Tie' Video