Jamie Lynn Spears

Jamie Lynn Spears may not want to be known for being Britney's little sister, but she doesn't mind singing a few lyrics to 'Oops! I Did It Again,' the pop star's biggest hit. The younger sister and country newcomer recently performed a mashup of the pop song with her own country song, proving she has talented chops of her own.

With her debut single 'How Could I Want More,' newcomer Jamie Lynn Spears has emerged onto the country music scene as a promising young singer. Her first Billboard chart appearances are enough to make anyone jealous -- but does that mean she has sibling rivalry with big sister Britney?

Jamie Lynn Spears' country debut is as honest and authentic as many (OK, most) figured it probably wouldn't be. 'How Could I Want More' is a sharp, vulnerable lyric that the 22-year-old little sister to Britney Spears takes full ownership of. There's not a whiff of that pretension that so often follows a pop star as he or she crosses into country music.