Taylor Swift is racking up boyfriends faster than music awards!

The country cutie’s latest beau is Glee star Cory Monteith, but The ENQUIRER has learned that Taylor is three-timing the Canadian actor with exes Taylor Lautner and John Mayer!

"Taylor can’t make up her mind about which guy she wants to be with," revealed an insider.

The 20-year-old  beauty  broke up with wolf-boy Lautner late last year because of their busy schedules, then started seeing Mayer.

Taylor, however, tossed him to the curb when her mom Andrea gave John the thumbs down – and that’s when she connected with Cory.

"But Taylor is still carrying a torch for Lautner and Mayer – so she’s seeing all three guys behind their backs," divulged the insider.

"It’s out of control!"

Taylor and 27-year-old Cory first stepped out together in January, publicly meeting up again at a pre-Grammy Awards party.

"Taylor is sowing her wild oats," explained the insider. "She thinks Cory is a sweetheart, but she’s telling friends he’s a little tame for her."

Taylor, however, isn’t ready to get rid of Cory yet – because her mom has given him the stamp of approval.

"Plus, he’s a great cover for her flings with Lautner and Mayer," added the insider.