Mariah Carey, who hasn't toured in over three years, will embark on a national "Angels Advocate" trek beginning Dec. 31 at Madison Square Garden in New York City, and wrapping up on Feb. 27 at The Pearl Concert Theater in Las Vegas, Nevada. Presale tickets will be available for Honey B. Fly, the official Mariah Carey Fan Club, members for all show dates. Tickets for the majority of the tour will go on sale on Dec. 19. Visit Carey's official website, MariahCarey.com, for more details.

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

"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.

Here are the "Angels Advocate" tour dates:

Dec. 31: New York, NY (Madison Square Garden)
Jan. 2: Atlantic City, NJ (Borgata)
Jan. 15-16: Mashantucket, CT (MGM Grand Theatre @ Foxwoods)
Jan. 19: Atlanta, GA (Fox Theatre)
Jan. 21: Hollywood, FL (Hard Rock Live at Seminole Hard Rock Hotel & Casino)
Jan. 25: Detroit, MI (Fox Theatre)
Jan. 27: Washington, DC (DAR Constitution Hall)
Jan. 30: Boston, MA (Wang Theatre)
Feb. 1: Philadelphia, PA (Tower Theatre)
Feb. 4: Montreal, Que. (Bell Centre)
Feb. 6: Ottawa, Ont. (Scotiabank Place)
Feb. 9: Toronto, Ont. (Air Canada Centre)
Feb. 10: Columbus, OH (Schottenstein Center)
Feb. 13: Chicago, IL (Chicago Theatre)
Feb. 16: Minneapolis, MN (Northrop Auditorium)
Feb. 18: Dallas, TX (Nokia Theatre)
Feb. 20: Phoenix, AZ (Dodge Theatre)
Feb. 23: Los Angeles, CA (Gibson Theatre)
Feb. 26: Oakland, CA (Oracle Arena)
Feb. 27: Las Vegas, NV (The Pearl Concert Theater)