Saw Les Mis in the summer for the second time, it has changed in the last 15 years but still brilliant. We may go again in the summer when Alfie Boe is taking over as Valjean. He was the lead in the recent 25 anniversary concert, although Simon Bowman the current lead is excellent as well.
Wicked is excellent as well.
I haven't seen Mamma Mia but loved the film and it is on my list to see.