Performing at the Grammy Awards or winning a Grammy Award can have a huge effect on an artist's sales. But, don't just take our word for it. Instead, check out the increased sales that artists like Rihanna, Frank Ocean, and Miguel are enjoying this week after their solid appearances at the 2013 Grammy Awards on Sunday night. Although the song wasn't nominated for an award at the Grammys, Rihanna performed her latest single, "Stay," on Grammys night and has sold about 67,000 copies of the song since then, which is a 300 percent increase compared to the numbers she was doing before the ... Read More