10/23/2006 at 03:00 PM EDT
Five months after the birth of her son Kingston, Gwen Stefani managed to drop her pregnancy weight through a combination of healthy diet and exercise.
"Let's just talk about how hard it's been," Stefani told Ryan Seacrest during an interview Monday on his radio show on L.A.'s 102.7 KIIS FM. The singer called in to premiere her latest single, "Wind It Up."
"That's been really hard," she said of losing the weight. "But it's almost gone." Stefani said she's still nursing and that her exercise regimen includes jogging regularly.
"I've just been eating healthy," she said, adding, "I cheat every day at least once."
Stefani also said she's planning to shoot the cover art for her latest album, due out Dec. 5, and then head out on tour in April – with Kingston in tow.
"I'm excited to go out there and have the baby on the outside," said Stefani, who announced her pregnancy during her last tour. Of Kingston, Stefani said: "He's the greatest thing in the world. There was no transition. It was just like, 'Where were you?' "
Stefani – who designs her own clothing line, L.A.M.B. – told Seacrest (after his admission that he admires Kingston's faux-hawk) that she enjoys dressing up her son.
"He finally has enough hair to do something with it," she said. "I was trying to give him some cooler looks."
Stefani's new album – the follow-up to 2004's Love. Angel. Music. Baby. – is tentatively titled The Sweet Escape.
Her single "Wind It Up" features a sample of the song "The Lonely Goatherd" – complete with Julie Andrews yodel – from The Sound Of Music. "It was a dream of mine to put The Sound of Music to a beat, because it's my favorite movie," said Stefani, adding that she cried when she first heard her rendition.
Other songs set to make the album include "Yummy" and "Orange County Girl," a track that Stefani – who hails from Anaheim, in Orange County, Calif. – explains is "about me."