Pink has been accused of grimacing during Christina Aguilera's performance during Sunday night's American Music Awards. In the past, the two pop stars have had their issues, but Pink denies she was making any faces. Fuse TV's Mark Sundstrom, tweeted that the pair are all good now and Pink retweeted his tweet. She also added, "Christina killed it tonight for one of our favorite singers ever. I hadn't seen her in years and years and years...I am in awe of Christina's talent.