Over 100 stars wish Popstar! Magazine a happy 10th birthday! Part one includes Nick Jonas, Selena Gomez, Miley Cyrus, David Archuleta, NLT, Miranda Cosgrove, Aly & AJ, Monet, and more. Part two features Demi Lovato, Ashley Tisdale, Kevin Jonas of the Jonas Brothers, Nick Lachey, Push Play, JC Chasez, Jordin Sparks, and more. Watch the clips below.