This particular Round-Up is for those that love Pop radio and currently have a lot of time on their hands. There are 22, yes – twenty two (count ‘em!), videos here. Only 3 different artists were covered this time around – Justin Bieber, Maroon 5, and Usher. As you can tell, for better or worse, these Youtube singers sure love to cover the same artists and songs! I’ve picked out 3 noteworthy clips ( for each artist covered) to start things off, the rest you’ll find after the jump.