Rihanna may be having trouble trademarking the name Robyn for her planned digital magazine, but the singer is definitely helping other publications on the newsstands. 

Women's Wear Daily has released a report that breaks down magazine sales based on covers. There's some talk about GQ's NBA-themed March issues (with Kevin Durant, Kobe Bryant, and Kevin Love on the cover, respectively), Vanity Fair's annual Hollywood issue, and more. But the gist of it is that if you want to sell mags, you'll need RiRi. According to WWD, Harper's Bazaar's sales increased by 120,000 copies in March when Rihanna was on the coverVogue sold more copies with Rihanna on the front page than with, say, Taylor Swift and Karlie Kloss posing together. 

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