R&B-pop vocalist Mariah Carey is ringing in the New Year with her first full-fledged concert tour in a little over three years. The 20-date...

R&B-pop vocalist Mariah Carey is ringing in the New Year with her first full-fledged concert tour in a little over three years. The 20-date Angels Advocate Tour launches January 2 at Borgata Event Center in Atlantic City, NJ, and continues through February 27 at the Pearl Concert Theater in Las Vegas, NV.

After the January 2 opening, Carey’s calendar currently has a two-week gap before she continues her tour with a January 15-16 stand at the MGM Grand Theatre in Mashantucket, CT. Other planned performances include January 30 at the Wang Theatre in Boston, MA; February 13 at Chicago Theatre in Chicago, IL; and February 23 at Gibson Theatre in Los Angeles, CA.

Carey is also bound north of the border for three engagements in Canada on February 4 at Bell Centre in Montreal, QC; February 6 at Scotiabank Place in Ottawa, ON; and February 9 at Air Canada Centre in Toronto, ON.

The first ticket onsales begin on December 18 for Carey’s performances in Hollywood, FL, and Dallas, TX. A majority of the singer’s remaining public onsales are set to start December 19, followed by both Ontario onsales on December 21.

The tour is promoting Carey’s twelfth studio album “Memoirs of an Imperfect Angel,” which debuted at No. 3 on the Billboard 200 after its September 29 release. The debut was slightly lower than expected as Barbra Streisand grabbed the No. 1 position in a surprising sales week. Carey’s two previous albums — 2005’s “The Emancipation of Mimi” and 2008’s “E=MC2” — both nabbed the top spot on the charts.

The last time Carey launched a full-fledged tour was with 2006’s The Adventures of Mimi Tour. However, the acclaimed singer did perform a mini-residency in Las Vegas earlier this season with a pair of two-night stands at the Pearl Concert Theater on September 11-12 and October 9-10.

Before launching the 2010 tour, Carey will kick off the New Year with a December 31 concert at Madison Square Garden in New York, NY. Her special guest for the New Year’s Eve show will be Trey Songz, while newcomers RydazNrtist will support her headlining tour.

Mariah Carey itinerary:
(Dates are subject to change.)

December 31New York, NYMadison Square Garden
January 2Atlantic City, NJBorgata Event Center
January 15-16Mashantucket, CTMGM Grand Theatre at Foxwoods
January 19Atlanta, GAFox Theatre
January 21Hollywood, FLSeminole Hard Rock Live
January 25Detroit, MIFox Theatre
January 27Washington, DCDAR Constitution Hall
January 30Boston, MAWang Theatre
February 1Philadelphia, PATower Theatre
February 4Montreal, QCBell Centre
February 6Ottawa, ONScotiabank Place
February 9Toronto, ONAir Canada Centre
February 10Columbus, OHSchottenstein Center
February 13Chicago, ILChicago Theatre
February 16Minneapolis, MNNorthrop Auditorium
February 18Dallas, TXNokia Theatre
February 20Phoenix, AZDodge Theatre
February 23Los Angeles, CAGibson Theatre
February 26Oakland, CAOracle Arena
February 27Las Vegas, NVPearl Concert Theater