British singer / songwriter Taio Cruz, 29, lit up Sunday night's Olympic closing ceremonies with his hit song, "Dynamite," performing from the passenger's side of a convertible Bentley while athletes and fans danced in the audience.

Cruz later joined musicians Tinie Tempah and Jessie J to perform the Bee Gees' "You Should Be Dancing." But it wasn't the music that made people take to Twitter — rather, it was Cruz's receding hairline.

"Who stole Taio Cruz's hairline?" one viewer tweeted about the "Break Your Heart" singer with the hashtag #FindTaioCruzHairline. "Finding wheres Taio Cruz hairline begins should be an olympic event," said another follower.

There's been a lot of talk about hair during these 2012 London Olympic Games. Zayn Malik sported some blond highlights during One Direction's closing ceremonies performance, and supposed sweetheart Justin Bieber made fun of Prince William's hairline, telling Rollercoaster magazine, "I mean, there are things that prevent that nowadays, like Propecia. You just take Propecia and your hair grows back."

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