Great Medley of 2011's Hit Pop Songs

We can't stop listening to this mash-up by Sam Tsui and Kurt Schneider.

Pinay Covers ”?"Born This Way,” Impresses Lady Gaga + 5 More YouTube Singing Sensations

Young Filipina Maria Aragon's rendition of Lady Gaga's song brought tears to the pop star's eyes. Will she join the ranks of these other stars who found fame via YouTube?