Mariah Carey (booking agent), who hasn't toured in more than three years, will embark on a national "Angels Advocate" trek beginning December 31 at Madison Square Garden in New York, and wrapping February 27 at the Pearl Concert Theater in Las Vegas.

The eight-week, 19-city tour will feature opening act RydazNrtist, a new R&B group signed to NCredible Entertainment, the label of Carey's husband, Nick Cannon.

The "Angels Advocate" tour is in support of Carey's latest album, "Memoirs of an Imperfect Angel," which has sold 344,000 copies in the United States, according to Nielsen SoundScan.

Presale tickets will be available for members of Honey B. Fly, the official Mariah Carey fan club, for all show dates. Tickets for most of the tour will go on sale December 19.

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