Question: who sings the christmas song all i want for christmas is you?
Answer: Mariah Carey

"All I Want for Christmas Is You" is a Christmas song performed by American singer and songwriter Mariah Carey.  She wrote and produced the song alongside Walter Afanasieff. Columbia Records released it on November 1, 1994, as the lead single from her fourth studio album and first holiday album, Merry Christmas (1994). It is an uptempo love song that includes bell chimes, heavy back-up vocals, and synthesizers.