Entertainment Rihanna Burns Up the Stage February 13, 2011 / 1:59 PM PST / CBS News (credit: MARK RALSTON/AFP/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (cedit: Larry Busacca/Getty Images For The Recording Academy) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (credit: read MARK RALSTON/AFP/Getty Images) Grammy Awards Performances: Rihanna (credit: read MARK RALSTON/AFP/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images) Grammy Awards Performances: Rihanna (credit: MARK RALSTON/AFP/Getty Images) Grammy Awards Performances: Rihanna (credit: Kevin Winter/Getty Images)