Nelly fans can circle June 24th on the calendar for the release of his long-delayed fifth studio album "Brass Knuckles" from Universal.      

The set's first single, "Party People" featuring Fergie, is already gaining radio airplay well before its May 15 add date. And the album track "Wadsyaname" appeared on the Billboard Hot 100 back in September, debuting at a career-best No. 43.       

The track list is still coming together, reports Billboard.com, but so far Nelly has recorded songs with Ciara, Lil Wayne, Snoop Dogg, Akon and LL Cool J.       

Missing from the list is Bruce Springsteen, whom Nelly was attempting to work with on a track.      

"I was really trying to get The Boss, but The Boss is all over the world," Nelly told The Associated Press on the orange carpet at Saturday's Kids Choice Awards. "It didn't really work out. I know he's interested in doing it. And I'm interested in doing it."      

"We still might get a chance to get it off," Nelly said. "We're saving it. We might repackage it for the holidays."