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  (Photo: Reuters)
  Julianne Hough and Ryan Seacrest in January at the 68th Annual Golden Globe Awards in Beverly Hills, California.

"American Idol" host Ryan Seacrest has revealed that his girlfriend Julianne Hough has a crush on one of the show's contestants, Phillip Phillips.

"We were backstage and you ran past my girlfriend and she sighed and blushed," explained Seacrest speaking to "American Idol" top six contestant Phillips during the show Wednesday.

The host added of his girlfriend, "I think I heard her say 'Yummy.'"

Hough was clearly enamored with Phillips after his performance of Dave Matthews Band's "The Stone," when cameras caught the actress blushing backstage.

"We'll talk about this later, darling," Seacrest joked to Hough in the episode.

While Phillips earned adoration from Hough, his performance was lambasted as "obscure and artsy" by "Idol" judge Jennifer Lopez. The 21-year-old singer seemed indifferent to Lopez's criticism though, explaining that he was flattered by Hough's attention.

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"I ain't complaining, [Hough's] a gorgeous woman and Ryan's an awesome guy so they're an awesome match," said Phillips speaking to Us Weekly backstage. "I think she got all giddy or something but I don't know. It was funny."

"I'm not trying to steal your girl, Ryan," the Georgia native added.

Afterwards, Hough's favorite "Idol" was revealed, her name became a trending topic on Twitter with fans of the show commenting on episode.

"Watch out, Seacrest," wrote Max. "Julianne Hough is sweet on America Idol's Phillip Phillips."

Shyra posted, "Julianne Hough was action [sic] a fool for Phillip Phillips."

Twitter user Chelsie wrote, "I totally appreciate julianne hough saying 'yummy' in reference to phillip phillips… that was priceless!"

Posting her laughter, Kate posted, "Julianne Hough (aka, Seacrest's girlfriend) has a massive crush on Phillip Phillips, & they showed a shot of her backstage! #idol"

Hough and Seacrest have been together since the spring of 2010. Hough is best known for her appearance on "Dancing with the Stars" and for her role in "Rock of Ages."

Despite reports that Seacrest was not feeling well Wednesday, the television personality soldiered through the two-hour "American Idol" episode last night.