“Telephone” by Lady Gaga featuring Beyoncé tops the 2 million mark in paid downloads this week. It’s the first all-female collaboration to reach this sales plateau in the digital era.

“Telephone” is the sixth Lady Gaga song to top the 2 million downloads mark, following “Just Dance” (featuring Colby O’Donis), “Poker Face,” “Lovegame,” “Paparazzi” and “Bad Romance”. The Black Eyed Peas are the only other act to amass six 2 million-selling digital hits as lead artists.

Source: Yahoo! Music