It’s been two years and two seasons of “The Voice” since Christina Aguilera‘s last studio album, but new music from the veteran pop star may be arriving before summer’s end.

A source tells Billboard that Aguilera is working hard on the follow-up to 2010’s “Bionic,” and that a new single is expected to be released in early August. The club banger was produced by Swedish pop hit-maker Max Martin, and its chorus is built around the line, “All I want to do is what you wanted.”

Martin — best known for producing hits by Britney Spears, Kelly Clarkson and Katy Perry, among others — has yet to helm a single for Aguilera.

Meanwhile, duets with Blake Shelton and Cee Lo Green, Aguilera’s fellow coaches on NBC’s “The Voice,” are apparently in the works for the singer’s forthcoming album as well. Last April, Green revealed that he and Aguilera were indeed working on a follow-up to their first collaboration, “Nasty,” which surfaced online last year after failing to make the final track list of Aguilera’s “Burlesque” soundtrack in 2010. Aguilera’s last collaboration with a “Voice” co-star, as a featured vocalist alongside Adam Levine on Maroon 5‘s 2011 single “Moves Like Jagger,” netted the pop star her fifth chart-topper on the Hot 100, and her first No. 1 in 10 years.

Released through RCA Records in June 2010, “Bionic” has sold 308,000 copies, according to Nielsen SoundScan. The set failed to produce a hit single for the singer — its highest-charting cut, “Not Myself Tonight,” peaked at No. 23 on the Hot 100. By comparison, the soundtrack to “Burlesque,” to which Aguilera contributed eight songs, has moved 593,000 copies since its November 2010 release, according to SoundScan.

In March 2011, the singer signed on as a coach for “The Voice,” which wrapped its second season on NBC in May. The reality competition will return for its third season this fall. –Billboard