Lady Gaga at the 2013 NYC Pride Rally. (Getty)

Lady Gaga at the 2013 NYC Pride Rally. (Getty) Credit: Lady Gaga at the 2013 NYC Pride Rally. (Getty)

Two of the summer's most-anticipated songs leaked online over the weekend, forcing two of pop's biggest stars to go into emergency mode and officially drop the tunes before they wanted to.

Lady Gaga Monday released "Applause," the first single from her November album "ARTPOP," a full week before she wanted to after leaks of the song popped up online on Saturday, the singer said on Twitter.

"A POP MUSIC EMERGENCY IS UNDERWAY 911," Gaga tweeted Monday. "DUE TO HACKERS AN ABUNDANCE OF LOW/HIGH QUALITY LEAKS...WE ISSUE THIS POP MUSIC EMERGENCY...MONSTERS SPREAD THE WORD."

The song was then released to radio stations nationwide, and was expected to hit the iTunes store later last night.

Gaga's hand was forced just days after Katy Perry released her new single, "Roar," on Saturday, two days before it was supposed to be out.

"HEY! I know how you guys can make me feel better about the leak...Get #HAPPYBIRTHDAYDAVID trending for my lil bro's 25th today! @sirdavidD," Perry tweeted on Saturday.

But it's not all bad news for Perry, as Monday she was added as a performer to the VMA's on Aug. 25 at the Barclays Center.

Perry's album, "Prism," is due out Oct. 22.

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