Nick Jonas guest stars as Lyle West on NBC's 'Smash' next week. Lyle is a sitcom star who got his start as a child actor on Broadway. Though the role isn't a huge jump for the Jonas Brother, he nails it. Jonas channels his Broadway role in 'How to Succeed in Business Without Really Trying' and 'J.O.N.A.S.' television experience -- he looks like he's ready to steal the entire show.

Jonas performs an amazing rendition of Michael Buble's hit 'Haven't Met You Yet.' His cover is slower and thus slightly more somber than the original. He slams his piano keys and sings as soulfully as he can, captivating his audience -- and it looks like he actually woos Ivy in the process. She looks ready to swoon by the song's end!

In another clip, Jonas as Lyle tries seducing Ivy. Scandalous! "I can see why they cast you as Marilyn," he says, kissing Ivy's hand. "That dress is amazing." With a raised eyebrow, Derek responded, "This is very precocious behavior coming from a 15-year-old." Lyle's response? "I'm actually 12. And precocious would be showing you the bedrooms." Ow! Looks like the littlest Jonas is all grown up.

Nick Jonas' episode of 'Smash' airs Monday, Feb. 27, at 10PM on NBC.

Watch Nick Jonas as Lyle on 'Smash'


Watch Nick Jonas Perform 'Haven't Met You Yet' on 'Smash'