Christy Canyon's Epic 90s Threesome Tit-Fest with TT Boy & Pete
In the mid-90s, Christy Canyon briefly returned to porn after Vivid offered her a lucrative contract. It's reported that many male performers contacted Vivid and begged to let them work with the legendary actress. (from "Comeback", 1995)
I think Sasha Grey is a "best butt of all time" contender - Grand Theft Anal 11 (2008)