Throughout Big Brother 5, she was known for her showmance with Drew Daniel, as well as being a member of the powerful Pinky Swear Alliance. Once the alliance crumbled after twins Natalie and Adria turned on the alliance and were evicted back-to-back, she aligned with Drew and his ally Cowboy. This got her to the final 3 with the two of them. After losing the final Head of Household, she was shockingly evicted by Drew in the Final 3, causing her to be the seventh and final member of the jury on Big Brother 5.
She would later return in Big Brother 7. In this season, she aligned with Nakomis once again and formed a side alliance with her former rival Jase, which was known as the Mr. and Mrs. Smith alliance. After being left out of the first vote, and all of her allies being evicted consecutively, Diane was nominated as the replacement nominee by Janelle when Mike used the veto to take himself off the block, instead of the other half of ChilltownWill. Diane became Janelle's main target due to the latter's dislike of her, and seeing her as being the biggest threat of the floaters in the house. Despite several people liking her and considering keeping her, on eviction night, Diane was evicted by a 7-1 vote, placing 11th.