Hyper-energetic Internet sensation is clean and fun.

Rihanna keeps her lyrics clean in raw, pensive ballad.

A melancholy but clean breakup ballad.

Megastar's return falls flat; edited version OK for teens.

Bieber grows up in clean but more mature track.

Supergroup’s "comeback" track has '90s sound; one iffy word.

Comedy rappers get silly in this clever parody.

Clean, upbeat track about working hard to achieve goals.

Soundtrack offers upbeat pop covers; a few steamy tunes.

Excellent but explicit rap debut; lots of iffy content.

Smith sibs collaborate in slow, clean rap track.

Bieber-like Brit gets a little edgy, references sex.