Heidi Montag And Spencer Pratt Talk Wedding, Heidi's 'Sex Ed' Performance

'The Hills' newlyweds call Ryan Seacrest's radio show to talk about the big day.

Newlyweds Heidi Montag and Spencer Pratt called in to Ryan Seacrest's radio show on Tuesday (April 28) from Cabo, Mexico, where they revealed they were on a working vacation following their Pasadena, California, wedding.

"We're not on our honeymoon technically yet. This is a music-video shoot we're doing this weekend," Heidi said. "The honeymoon's coming in a couple weeks."

The couple also addressed how they are dealing with Mexico's swine-flu epidemic while filming the video for "Black Out," the new single from her yet-untitled album. "We're definitely wearing the face masks everywhere we go," Spence said. "We're not playing. I'm not trying to get pig flu! We're in isolation. We're in, like, full hiding."

After Heidi and Spencer plugged the single, the pair finally got down to business and talked about their wedding, which the bride described as "unbelievable." "All of our friends and family were there," she said. "And they were all so supportive and loving. There were so many fans waiting outside that were screaming when we came out, and we appreciate their support."

Although the pair wanted to remain tight-lipped about who was at the wedding, they did explain why Kristin Cavallari, who caught the bouquet, was there. "Kristin is the one who actually introduced Spencer and I ... in a nightclub three years ago," Heidi explained, adding that the wedding had been in the works for a while. "We've been planning it for a couple years. ... We did that thing in Mexico and realized it wasn't legal."

With a legal marriage out of the way, Spencer and Heidi revealed that after the family and friends cleared out the pair had quite a wedding night. "The best part about the wedding, one of them, was Heidi's wedding gift to me," he explained. "She wrote and performed a little show for me to her new song she did called 'Sex Ed.' It is quite a little show I got ... at the Beverly Wilshire Hotel after our marriage. ... I think it was a onetime [deal]."