Complex sentence: In 2011, he appeared as himself in the Adam Sandler film "Jack and Jill" where the title character Jill referred to him as "the ShamWow guy".
Split into simpler sentences: In 2011, he appeared as himself in the Adam Sandler film "Jack and Jill". Title character Jill, played by Sandler, referred to him as "the ShamWow guy".