Unfortunately these awarRAB seldom have any booby-prize section for most pointless film/rubbish singing/worst loss of 2 hours of your life that you aren't going to get back.
To add insult to injury, it looks like this behemoth of a cinematic masterpiece also failed to get any recognition in the Oscars, contrary to what a lot of posters on here seemed to expect!
Here, I'll write the script for you!
They all decide to go down the shops to buy some groceries. All the women dance down to the Tescos (plenty of opportunity for songs here). When they get there, they see that all the Tesco shelf fillers are blokes, and they do the all male song and dance routine. The women can't decide what type of booze to buy, red wine, white wine or pink champagne. So, after a few songs about their indecision, and suggestions from the Tesco staff, they zanily buy all THREE!
Slapstick comedy shenanigans with Julie Walters at the self-service checkout. Opportunity for 'ripe melons', 'lovely pear', cucumber and suggestively shaped carrot jokes aplenty.
Everyone, Tesco staff included, dance and sing their way home for a big party at the villa, whereupon the Tesco manager, dressed like Freddy Mercury from the start, accidentally drinks Pink Champagne and likes it, thus discovering, as a complete revelation to himself and everyone around him, that he is infact a gay.
All (badly) sung to the songs of Queen, if required pad out with some of Victoria Wood's numbers from lesser known sketches.
Possibly ask Dale Winton if he would perform a Supermarket-Sweep cameo.
Call it "Mamma Mia 2 - I want to break free".