THEY ARE: X Factor finalists Niall Horan, Zayn Malik, Liam Payne, Harry Styles and Louis Tomlinson, who graced Simon Cowell's stage in 2010. Originally solo performers, the fivesome came together at the urging of Nicole Scherzinger, which helped catapult them to a third-place finish and a burgeoning career as a teen heartthrob collective.

WHERE THEY'RE FROM: England and Ireland, where grooming young lads for global domination is as prevalent as enrolling in a local football league.

WHAT THEY'RE LIKE: Cute and talented performers with a not-so-secret appreciation for R&B, they're the boys you want to invite over for tea with your mum.

THEIR HOBBIES: Groomed on live television, the band has shown no opposition to continuing their career in front of the camera. After being met with success by their home audience, they'll further their Westward expansion with an appearance on Miranda Cosgrove's Nickelodeon series iCarly this spring.

THE HITS: While "What Makes You Beautiful" has already reached No. 1 in the UK, second single "One Thing" has received the video treatment stateside, giving American fans more insight into lives of those across the pond while they wait for debut album Up All Night's March release.

THE SONG: "What Makes You Beautiful" is a peppy vote of confidence that features not one but five handsome gents urging their subject to realize their true beauty a la Drake's "Best I Ever Had." Unabashedly fun, the inclusion of "na na na na" and a clapping breakdown help make this the ultimate singalong track.

  THEY ARE: The "Tonight, Tonight" pop/rock hitmakers and the "You're a Jerk" hip-hop duo, respectively.

WHERE THEY'RE FROM: Hot Chelle Rae can boast of being one of the rare non-country success stories from Nashville, TN, while New Boyz hail from Hesperia, California.

WHAT THEY'RE LIKE: Young, ebullient and very, very hooky. What's more, they're equal-opportunity in their pop friending—not only were rappers The New Boyz and Bei Major featured on Hot Chelle's 2011 album "Whatever," but they also included a duet with Demi Lovato, and toured with Taylor Swift to support it.

THEIR HOBBIES: When they're not getting drunken tattoos that look like their ex-girlfriends mixed with Zach Galifianakis, the band spends a lot of time on the road, even playing at the Pro Bowl last weekend. Guitarist Nash Overstreet's brother Chord's extracirricular activities are more notable, as he plays Sam Evans in the hit show "Glee."

THE HITS: "Tonight Tonight" was the 32nd biggest hit of 2011, according to Billboard, while "I Like" has already hit #28 on the charts. That makes an impressive fifth top 40 hit for the New Boyz in their young career, after "You're a Jerk," "Tie My Hands," "Better With the Lights Off" and "Backseat."

THE SONG: "I Like it Like That" is for listeners that thought that "Tonight, Tonight" wasn't quite youthful, catchy or enthusiastic enough. There are ten songwriters listed on the song, and undoubtedly all ten were needed to come up with a song this poppy. Windows down, chilling with the radio on, girls taking it all off—perhaps not since "I Gotta Feeling" has a song made partying this inarguable.