Taylor Swift was reportedly heartbroken after giving up her virginity to one of her famous exes, only to be crushed when the guy bailed on her birthday part.
The loss of Swift's v-card, followed by that rejection, left the unlucky-in-love singer locked in a bathroom crying the entire night, according to Radar.
So who was the celebrity who convinced her to go all the way?
According to a supposed insider ... it was Jake Gyllenhaal!
Swift had been “saving herself for marriage” but was so smitten with the movie star that after three months of dating, they consummated the relationship.
“She thought she was going to marry Jake, that’s how in love she was with him,” the source says of the relationship, which fizzled out in late 2010.
Now 24, Taylor threw a 21st birthday party for herself in December 2010 at her family’s estate in Nashville, Tenn., and Jake was expected to fly in for it.
“The day before - all was set - he was coming, no issues. But the day of, she doesn’t hear from him at all. No texts, no phone calls,” the insider revealed.
“Taylor thought maybe he was planning some sort of surprise. Nope. He didn’t show up and she locked herself in the bathroom and cried the entire night.”
Eventually, he did text ... to break it off.
Talk about pulling a page out of the Joe Jonas Breakup Playbook, only even less cool than leaving a voicemail. Naturally, Swift was crushed by Gyllenhaal.
“Her [split with Jake] inspired every word of RED,” the source said of her album. “The song that specifically references this ‘event’ is ‘The Moment I Knew.’
"The lyrics are all about her birthday party and Jake not showing up. 'You should’ve been there, Should’ve burst through the door. You said you’d be here.'”
Throughout the song, Swift describes how she was waiting in her “party dress” for him to show up and admits that when he didn’t she retreated to the bathroom.
Moreover, years later, insiders say that the popular country-pop singer is still "stuck" Gyllenhaal and says the relationship left her “damaged goods.” Poor girl.
As for other famous guys who dated Taylor Swift for various lengths of time and with varying degrees of seriousness, scroll through the (long!) gallery below: