It's a good laugh however, it's definitely a Chick Flick! Going to try and explain a simple explanation of the storyline...
Annie, is a romantically unattached failed bakery owner who fears she's losing her bestfriend, Lillian. When Lillian announces she's gotten engaged Annie's obviously excited to be a part of creating Lillian's wedding. Annie starts to worry as Lillian grows close to Helen, a wealthy and beautiful new friend who quickly takes control of planning all the pre-wedding events(Hen Do's etc). On top of the main storyline of a female friendship being torn apart, the movie adds a romantic trace for Annie. She starts the film by being a handsome Ted's banker*, but develops a lovely flirtation with an Irish cop named Rhodes after he pulls her over one night thinking she's driving drunk. As Annie's insecurity destroys any chance of the blossoming relationship from working out, she also feels the most important friendship in her life slipping away.
In the end, Lillian and Annie make up after a lot of hiccups and Annie actually being banned from the wedding and any celebrations before hand; she ditches Ted then Annie and Rhodes become an item.
A worthwhile watch!
*Banker- Someone who is a safe option but they don't actually feel anything towards them.