Cast
Meryl Streep - Donna
Amanda Seyfried - Sophie
Pierce Brosnan - Sam
Colin Firth - Harry
Stellan Skarsgard - Bill
Christine Baranski - Tanya
Julie Walters - Rosie

The storyline
We're on a beautiful Greek island where Sophie lives with her mother Donna, an owner of a hotel who's single but men aren't her problem as she is this kind of an independent aging hippie who now has to worry about the business and most importantly at the momemnt, her daughter's wedding as Sophie plans to marry her boyfriend Sky. The wedding will be perfect besides she doesn't have a father to give ger away. Spying in Donna's old diaries she realizes there are three possible fathers, so why not invite them all to the wedding and then see who's the right one? As crazy as this sounds, Sophie is a girl of action and sends the invites. It's obvious the three men, as different as they could be, accept, else there wouldn't be a point in the film, and the fun can start. Sam, Harry and Bill meet already during their trip to the island, but they have yet no idea how closely bound they actually are. Well, as close you can imagine two businessmen and a lone sea wolf to be, a woman has to be the joint point.

Sophie of course wants to hide the "fathers" from her mother, silly enough to believe it would work and that in the end Donna would jump of joy to meet only the real father. Of course Donna discovers the guys rather pretty soon and if she jumps, it's not of joy as any person who can imagine having their three old-time ex boyfriends brought into their house all the sudden can guess. On the other hand, she's not so determinate to get rid of them to kick them off the island. Further we watch Sophie meeting each of the men separately and finding out sth that makes him Mr. Father in her eyes, so in the end all of them are supposed to give her away only they don't know about the other two. Quite a messed up situation based on good old miscommunication.
Who's gonna give Sophie away in the end and who is the father? It's a comedy, so shall the comedy proceed to its happy end we all knew would be coming.

Overall, I did like the film a lot. It was easy to just sit back in the packed cinema, open my Coke and stuff myself with popcorn watching a light comedy movie you don't really need to think about (besides thinking "omg, Meryl's hot!"), only enjoy the parts you like. It was cool to hear all those old ABBA songs that I just love and had been growing up with.

During the film there actually was more singing and dancing than I expected, sometimes it felt good, sometimes not so good, the songs were implanted into the story. Should I evaluate the musical part in general, I'd say it was quite good.
I did very much like Meryl Streep's singing, I think her performance of Mamma Mia! was the best song in the whole movie and the little show she gave with Christine Baranski and Julie Walters as The Dynamos was sheer fun, without any depth, but fun. As Streep herself said: "I'm really doing this to embarass my 20-sth-year-old children. The dancing will mortify them and they'll have to move to Alaska or some place like that."
Streep's duet of The Winner Takes It All with Pierce Brosnan felt a little pathetic though.
What I've heard from the critics was that Pierce Brosnan was the worst singer in the film and I have to agree with that. BUT on the other hand I appreciate despite being scared of the role, he didn't give up and sang his part. I wouldn't cathegorize the film as a musical, because it was like fifty fifty music and story. For me, the actors have given great acting performance and I don't care so much that the singing of some of them was not perfect. It's more important to me that they all sang themselves and during acting, without using playback. Had the singing been playbacked (not to mention sang by pro singers) just for the sake of having a flawless musical, it wouldn't have worked for me.