Pop diva Madonna gets some help from hip-hop super-producers Timbaland and the Neptunes' Pharrell Williams on her upcoming album, 'Hard Candy,' due April 29.

The singer's follow-up to 2005's disco smash 'Confessions on a Dancefloor' brings her back to the clubs, but this time with a hip-hop/R&B vibe. The expected first single, 'Four Minutes,' features vocals from Justin Timberlake, who will induct Madonna into the Rock and Roll Hall of Fame on March 10. Madge once again delves into rapping (see the awkward "latte" and "Pilates" rhymes on 'American Life'), but this time out the singer rhymes about "reinvention" over a tough, bass-heavy track, courtesy of Timbaland and Nate "Danja" Hills.

Pharrell adds some flavor to the diva's new project on the track 'Give It to Me,' which features a signature Neptunes spacecraft breakdown mid-track. The singer mellows out on the acoustic-tinged ballad 'Miles Away.' As the title suggests, the pop star sings about long-distance love and cries, "When I'm gone, you realize I'm the best thing that's happened to you."

While there are no official tour plans, fans can expect the superstar to unveil new material at intimate venues in Paris, London and New York.