Don't get freaked out by that photo -- Katharine McPhee is definitely not marrying Ryan Seacrest. But she might be engaged to her 42-year-old boyfriend, actor Nick Cokas. People is reporting that the American Idol runner-up "is bubbling over with excitement for her upcoming wedding," a source said. "She is all smiles when she talks about the planning. It sounds like everything is going very smoothly." The 23-year-old singer's reps had no comment.

(Photo: AP)