Beyoncé Knowles is a person who acts .
Her marriage to rapper Jay Z and portrayal of Etta James in Cadillac Records -LRB- 2008 -RRB- influenced her third album , I Am ... Sasha Fierce -LRB- 2008 -RRB- , which saw the introduction of her alter-ego Sasha Fierce and earned a record-setting six Grammy Awards in 2010 , including Song of the Year for `` Single Ladies -LRB- Put a Ring on It -RRB- `` .
Beyoncé