Nicole Richie chatted with Ryan Seacrest Thursday on his KIIS FM radio show, and she addressed rumors of a feud with Jessica Simpson.

Reportedly, the two haven't been getting along on the set of their upcoming reality competition show Fashion Star. Said Nicole:

    "That couldn’t be further from the truth. I love and adore Jessica. I’ve known her for years ... who she is is someone who’s very kind, very sweet and extremely smart and a great businesswoman … I actually couldn’t love someone or respect someone more."

Wow -- who knew they were that close! Nicole also chatted about son Sparrow's upcoming 2nd birthday, though she said Sparrow will be getting a "small" party!

“Let’s not forget that I’m turning 30," she said. "I feel like this is the year where I’m really going to celebrate my birthday, because I usually don't."