Although it seems a little odd that the Jonas Brothers have the need for a new show in 2010 — they have transcended their Disney Channel roots and have become a brand name like Twilight or Justin Bieber — the existence of Jonas L.A. does free the group from the fussier musical ambitions that mucked up Lines, Vines and Trying Times and Nick Jonas’ solo venture. The Jonas Brothers leave behind stiff mature soul for bubblegum pop that’s perhaps not as snappy as A Little Bit Longer but a lot closer to that fizzy rush than anything they’ve done since 2008. After a few years of the JoBros attempting to sound older than their years, this switch is a welcome relief, and Jonas L.A. possesses a true sense of fun, something that did not come easy on Lines. As fitting a television soundtrack, Jonas L.A. leans toward slick studiocraft, which actually winds up as a positive, giving the trio polish and panache in equal measure. Perhaps they're playing by the rules more than they did on Lines, but that’s a good thing: they’re letting themselves act like kids, not adults, winding up with a clutch of lively, effervescent pop.