We've seen Rihanna rock the shirt-tied-around-the-waist trend before, often with a plaid shirt. But yesterday, the singer stepped out in London in an all-denim look. Check out her spiked shorts layered over a button down wrapped around her waist.

If you recall, we spotted Kanye West last week sporting the same look. Guess Yeezy's take on the 90s trend is catching on. We like to call this the "Kanye effect."

[images via Fashion Bomb Daily]

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