R&B outfit Jagged Edge will on Dec. 20 release its fifth album, which features collaborations with John Legend and rapper Big Duke of Boyz N Da Hood. The self-titled Columbia/Sony Music Urban set also boasts production by Jermaine Dupri and tha Cornaboyz, among others.

Lead single "So Amazing," featuring Voltio, debuted last week at No. 87 on Billboard's Hot R&B/Hip-Hop Songs chart. Members and twin brothers Brian and Brandon Casey serve as co-executive producers of the new disc.

"This time we stepped out on our own and fine tuned things without a lot of outside help, did the majority of the work," says Brian. "No matter what your forte might be, if you're a true artist you get to a point where you want to step out of your box a little bit. So this time you're hearing a different side of Jagged Edge. We're never going to forsake our classic sound. We're just going to present it in a new way."

For the track "Seasons Change," the group reached out to labelmate John Legend. "Every singer does a song these days with a rapper but how many R&B acts get to record with another singer, and one who can deliver as good as we can?," Brian says. "It was a great match."

Jagged Edge's last album was 2003's "Hard," which peaked at No. 3 on The Billboard 200 and has sold 871,000 copies in the U.S., according to Nielsen SoundScan.