Pierce Brosnan chats with ET about 'Mamma Mia 3' at the premiere for 'MobLand ... Cher chats with ET on the Paley Center red carpet for the premiere of the documentary, 'Bob Mackie: Naked ...

Mamma Mia! 3 still hasn't been officially confirmed, and Amanda Seyfried thinks it's not just because of cast availability. Seyfried added that creator Judy Craymer is still "working on it" though ...

Benny Andersson, Bjorn Ulvaeus, Anni-Frid Lyngstad -- known as Frida -- and Agnetha Faltskog walked down the red carpet at a Stockholm movie theatre ... Colin Firth and other members of the Mamma Mia!