KELLIE PICKLER’s obsession with DWTS partner DEREK HOUGH is driving her friends and family crazy!

The former “American Idol” contestant and country music cutie was a total novice when pro hoofer Derek took her under his wing on last season’s “DWTS.” But with Derek’s guidance, the pair went on to win the coveted mirror ball trophy on the show’s May 21 finale.

NOW a grateful Kellie wants to thank Derek by making him a big music star. But all the talk about her new BFF is driving those close to Kellie to distrac­tion – especially her hubby, songwriter Kyle Jacobs.

“Kellie is just bubbly by nature, and when she makes a friend, it’s like all warm, wet kisses,” a source said. “She’s still excited about win­ning ‘Dancing with the Stars,’ all she ever talks about is ‘Derek, Derek, Derek!’

“She tells her personal trainer, ‘Well, Derek said I should work out this way,’ she tells the members of her band that Derek should join them on tour, and she even tells her husband she’d like Derek to come and stay with them.

“Kyle’s not the jealous type, but he’s like, ‘Enough with Derek already!’”

Derek, 28, recorded a pop album in 2009 with fellow “DWTS” pro Mark Ballas, but it tanked. Kellie believes that if he changes his sound to country he’ll be a huge success – and she wants to lead his parade in Nashville.

While the 27-year-old firecracker has admitted to hav­ing a “little crush” on Derek, sources insist her hubby has nothing to worry about.

“Kyle is kind of used to Kellie’s hyper happy behavior and laughs about it,” the source added. “But he still told her that Derek isn’t moving in with them!”