Justin Bieber arrived for this evening's American Music Awards in LA with his mom Pattie Mallette on his arm! He's in the middle of a very public breakup from longtime girlfriend Selena Gomez but put his mind back on work to attend the AMAs and see if he takes home a new statue. Justin's up for three prizes in the categories of artist of the year, favorite pop/rock male artist, and favorite album. Justin's got the support of his many female fans to help him get through his split. Things aren't totally done between Justin and Selena, though. Justin and Selena had a dinner date over the weekend, but Selena only ended up staying at the restaurant for a few minutes.