Lady Gaga (born Stefani Joanne Angelina Germanotta; March 28, 1986) is an American recording artist. She began performing in the rock music scene of New York City's Lower East Side.
Christina Marķa Aguilera was born in December 18, 1980. She is an American pop musician. Aguilera first appeared on national television in 1990 as a contestant on the Star Search program.