From rooting for rivals to posting unflattering photos, it's all fair in love and Twitter war!
Credit: Courtesy Joel Madden
Updated: Tuesday May 04, 2010 | 06:00 AM EDT
By: Cara Lynn Shultz
More from PEOPLE
See More News
3 of 9
"LMFAO-You can't tell but me and Nicole were arguing through our teeth in this picture," revealed Madden. "Do you ever do that with your partner? Try doing it on a red carpet! I can't even remember what we were arguing about."
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.
In partnership with AOL