Kate Upton celebrated her birthday by giving fans some side boob.

The blonde bombshell posted a boomerang of her side boob on her Instagram page. Kate definitely knows what her fans want - she also posted the following hashtag - #iknowyouwannaseemenakeynakeynaked

The super rich supermodel turned 26 on June 10th and trust me, she can afford to splurge on her birthday. Kate is said to have a net worth $20 million dollars. Looks and all of the money? Life is just not fair. Enjoy Kate's side boob below. Happy Birthday to YOU!