Singer John Mayer is ringing in his 37th birthday today so to celebrate we're taking a look into his 'Little Black Book' and recounting aaaall the famous ladies he's dated throughout the years.
Spoiler alert—there is A LOT of history. And you'll probably find some women on the list you don't even remember him having flings with!
Click through the gallery to see John's many romances—from Jennifer Aniston, Taylor Swift and Katy Perry to Minka Kelly and Jennifer Love Hewitt, the gang's all here!
John briefly dated the actress back in 2002 before he hit it big in the music world. Rumor has it he penned his Grammy-winning song "Your Body is a Wonderland" about Jennifer, although she has since denied it.