The film was slated by critics and shunned by cinemagoers when it was released in 2003, causing it to flop badly - much like Affleck and Lopez's real-life romance.
It was pulled from theatres after just three weeks, earned its stars Razzie Awards and now comes out top in Moviefone.com's new list of of the worst.
Editors picked Gigli above Paris Hilton's movie flop The Hottie & the Nottie; American Idol spin-off From Justin to Kelly and Ellen DeGeneres' Mr Wrong.
The top 10 as follows:
1) Gigi, 2003
2) The Hottie & the Nottie, 2008
3) From Justin to Kelly, 2003
4) Mr Wrong, 1996
5) The Beautician and the Beast, 1997
6) Dirty Love, 2005
7) Mannequin: On The Move, 1991
8) Because I Said So, 2007
9) Summer Catch, 2001
10) All About Steve, 2009.
The French movie legend will unveil the tribute next week (08Dec09). Her piece of pavement sits between the stars of her mentor Gene Kelly and Gigi co-star Louis Jordan.
Caron was championed for the honour by Neal Baer, the executive producer of TV show Law and Order: SVU, for which the actress won a guest star Emmy in 2007.
The GiGi star was five years older than Beatty when she left her husband to romance the Hollywood Lothario and when he started working on the classic heist movie, she felt sure she'd play his leading lady.
In her new memoir, Thank Heaven, Caron recalls, "He told me bluntly, 'Let's face it, you're too old for me.' That hurt.
"But now that 40-plus years have passed and the pain of Warren's rejection has worn off, I can smile at his raw ambition and ruthlessness."
The pair joins stars including lifestyle queen Martha Stewart and celebrated American astronomer Carl Sagan for the new AOL series - which will also feature shows about arts and science.
Bundchen's GiGi & the Green Team and business mogul Buffett's Secret Millionaire's Club are scheduled to debut online this autumn (09).