Christina Aguilera Tonight connects with the audience

Against the tribal house-inspired rhythms percolating throughout "Not Myself Tonight," Christina Aguilera issues a proclamation: "I'm doing things that I normally wouldn't do. The old me's gone. I feel brand new."
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But gauging by radio's reaction to the lead single from "Bionic," Aguilera's first studio set in four years (which RCA will release June 8), the singer's hit-making instincts are intact.

"Not Myself Tonight" is the No. 1 most-added song at mainstream top 40 and rhythmic radio stations this week, according to Nielsen BDS. The song is poised to debut high next week on the Mainstream Top 40 chart.

Polow Da Don co-wrote the single with his singing/songwriting protegee Ester Dean. Polow -- whose production credits include Keri Hilson, Usher and Fergie -- also produced the track.

"This song was just me and Ester freestyling one day as another friend of mine was jumping and dancing around the studio," he says. "Christina's people reached out and asked if I had anything hot for her. I sent this, which happened to fit the fresh, different angle Christina told me she wanted to hit people with on this album."

As Aguilera notes in a message to fans on her Web site, "Bionic" "was put together to represent those different parts of myself. I chose to collaborate with a variety of artists and producers across different musical genres. I was able to explore and create a fresh, sexy feel using both electronic and organic elements."

"Bionic" also features the Grammy Award-winning singer collaborating with Sia, Christopher "Tricky" Stewart, Le Tigre, Hill & Switch and Ladytron. And she reunites with songwriter Linda Perry, who contributes the ballad "Lift Me Up." (Perry wrote the singles "Hurt" and "Candyman" from 2006 album "Back to Basics" and Aguilera's 2002 hit "Beautiful.")

In the midst of finishing up "Bionic," Aguilera recently completed her first film role, in the musical drama "Burlesque," which co-stars Cher. The movie is set to premiere this fall.