Quick, try and spot Heidi Klum in this sea of balloons and flowers! No, the supermodel was not posing for a Hallmark ad, it was also her birthday this week. She turned a fabulous 38, and judging by the pic she uploaded to Twitter, Klum was practically overrun with birthday flowers and balloons from her fans. "Thank you so much for all of my beautiful flowers, presents and birthday wishes. Love Heidi,” she tweeted.