Credit: Jeff Kravitz/FilmMagic

What rivalry?

After Britney Spears dropped her seventh studio album, Femme Fatale, on Tuesday, Christina Aguilera praised her former Mickey Mouse Club costar on Twitter.

"Congrats on the Femme Fatale release!" Aguilera, 30, wrote. "Can't wait to see what you bring in the next video."

"Thanks," Spears, 29, responded. "Can't wait to watch you on your new show. Hope we get to hear that voice on The Voice."

Next up for Spears? Co-headlining a North American summer tour with Enrique Iglesias, 35, which kicks off June 17 in Sacramento, Calif.