Get 4 FREE Issues of PEOPLE
See who's been blowing out the candles!
Credit: Denise Truscello/Getty
Updated: Wednesday Oct 01, 2014 | 11:00 AM EDT
By: Rosa Heyman
More from PEOPLE
See More News
1 of 41
The "Sk8er Boi" singer has her cake (and we hope she eats it, too!) as she celebrates her 30th birthday on September 27th with a bash at The Bank Nightclub in Las Vegas.
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.