R&B star R. Kelly has delayed the release of his new album by a month. The I Believe I Can Fly hitmaker was due to unveil Black Panties in early November (13), but he has had to push back the launch of his 12th studio project to allow extra time to complete the mastering process. The album will now hit U.S. retailers on 10 December (13), just in time for Christmas. Black Panties isn't the only new music Kelly has been working on of late - he has also recorded an unlikely duet with Lady Gaga. The track, titled Do What U Want, is set to feature on the pop superstar's new album ARTPOP and she praised the R&B singer in a Twitter.com post earlier this week (ends18Oct13), telling fans he "sounds incredible" on the song. She previewed the tune online on Thursday (17Oct13).