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23-year-old pop star Rihanna has changed her hairstyle, yet again.

The ever vivacious pop diva tweeted a topless photo of herself Thursday night with the message: "#Back2Work 1st Cover of the year!!!! #ELLE."

Later she was spotted courtside at a basketball game between the Denver Nuggets and the Los Angeles Clippers sporting the blonde blowout.

And after the game RiRi took to the Roxbury nightclub in Hollywood with some friends to dance the night away.