Selena Gomez flaunted a sliver of side boob backstage before her performance at the American Airlines Arena on Dec. 2, 2013 in Dallas, Texas. Credit: Rich Polk/Getty

Taking the plunge! Selena Gomez is letting loose in her home state of Texas: Days after her half-time performance during the Cowboys-Raiders game on Thanksgiving Day in Arlington, Texas, the Southern sweetheart bared more of her bod on Monday, Dec. 2 at the 106.1 KIIS FM Jingle Ball in Dallas, Texas.

Gomez, wearing a navy Zara jumpsuit with an extreme plunging neckline, flaunted a sliver of side boob backstage before her performance at the American Airlines Arena. The "Come and Get It" crooner, 21, left her long brunette locks down as she beamed in front of the cameras.

Although Justin Bieber's ex shared a makeup-free selfie last weekend, the pretty pop singer opted for a full face of makeup both on the red carpet and onstage at Monday night's event. During her performance, Gomez sported a white bra top with a sheer attachment, high-waisted shorts and matching lace-up boots -- topping her look with a short wig.

She will perform next on Friday, Dec. 6 at the 102.7 KIIS FM Jingle Ball in Los Angeles.