So far, the big names rumored for Justin Bieber's new album include Kanye, Drake, his mentor Usher, Big Sean, and maybe even Lil Wayne (though truthfully it looked like Biebz and Weezy spent all their "studio time" outside on skateboards.) How many more very famous musicians can young Bieber crowd onto Believe? One, at least: Biebz told the U.K.'s Capital FM that noted "Baby" fan and Punk'd victim Taylor Swift contributed to the album as well. (Listen closely: That is the sound of a million tweens screaming with joy.) Vulture assumes that Bieber-GF and Taylor-BFF Selena Gomez gave the collaboration her blessing, and so we too approve. Still waiting on a Carly Rae-Bieber single, though.