Katherine McPhee and David Foster (With a 34-year age gap)
When it comes to romantic entanglements and how a couple meets, there are a lot of amazing stories. Katharine McPhee and David Foster met during the fifth season of American Idol, when Katharine was a competitor. David came over to help Katharine practice because she was going to be playing a song that he had written.
With David as her mentor, the two formed a connection and announced their engagement in 2018. The media, understandably, concentrated on their 34-year age difference rather than the relationship itself.