"That Rihanna reign just won't let up."  The singer dubbed herself the "QUEEN OF YOUTUBE!!!" on Monday, drawing attention to the nearly 6.5 million subscribers she's drawn to her VEVO channel.

"VEVO, thank you for this outlet that enables my fans and I to share music visually!" tweeted Rihanna, who released her "Stay" music video earlier this month.  As of Monday afternoon, the clip had garnered 3.6 million views.  In total, Rihanna has more than 3.4 billion video views.

Like Alicia Keys, Beyonce, Chris Brown and a few dozen other stars, Rihanna is a "VEVO Certified" artist.  That means that she has at least one music video that's racked up 100 million views.  So far, 10 of her clips are "Certified," including the visual for her Unapologetic lead single, "Diamonds."

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