Carey was named the best-selling female pop artist of the millennium at the 2000 World Music Awards. She has had the most number-one singles for a solo artist in the United States (eighteen; second artist overall behind The Beatles), where, according to the Recording Industry Association of America, she is the third best-selling female and sixteenth overall recording artist in the U.S..[9] In addition to her commercial accomplishments, Carey has earned five Grammy Awards, and is well-known for her vocal range, power, melismatic style, and use of the whistle register.