Complex sentence: Carrie Marie Underwood (born March 10,1983) is an American country music singer, songwriter, and actress who rose to fame as the winner of the fourth season of "American Idol", in 2005.
Split into simpler sentences: Carrie Marie Underwood (born March 10,1983) is an American country music singer, songwriter, and actress. She rose to fame as the winner of the fourth season of "American Idol" in 2005.