Selena Gomez had the best 21st birthday party ever, and she was so overjoyed that Justin Bieber arrived that she cried! However, there was one notable face missing at Malibu's Revolve Beach House, and that was Taylor Swift's. <br /><br />For more Hollywood news and gossip:<br />http://www.youtube.com/hollywoodbackstage<br /><br />Subscribe at: <br />http://www.youtube.com/subscription_center?add_user=HollywoodBackstage<br /><br />Like us on Facebook:<br />http://www.facebook.com/hollywoodbackstage<br /><br />Follow us on Twitter:<br />https://twitter.com/#!/HollywoodBstage
