If you thought Justin Bieber already packed a saccharine pop sensibility and stable hairstyle into a small package, you probably haven't seen Pocket Popstar, the younger brother of the fixie-loving Pocket Hipster. Both offer song suggestions (from We Are Hunted and APIs from The Echo Nest, publisher of Evolver.fm) based on the music on your iPhone, iPod Touch, or iPad. However, relations between the two "app-atars" (did we just coin a term -- nope) have reputedly deteriorated due to irreconcilable taste differences.
Pocket Hipster's animated characters offer lesser-known indie music while poking gentle fun at hipster music's snarkier advocates.
On the other hand, Pocket Popstar's hand-drawn avatars (one of which, the aptly-named Corey Young, bears more than a passing resemblance to The Biebs) suggest mainstream pop for you to enjoy in between their hair flips and heartfelt tweets to loyal cartoon fans. Also co-hosting this pop music suggestion shindig is a sparkly teen diva who could probably talk at length about unicorns or cheerleading.