SURPRISE GUESTS — Donna Sheridan (Karen Saldaña) is busy preparing for her daughter’s wedding in Masquerade Theatre’s production of “Mamma Mia!” when she gets a shock. Three men from her past — Harry Bright (Michael Poore, left), Bill Austin (Jay Jackson, third from left) and Sam Carmichael (Adam Campbell) — have arrived at her Taverna on a small Greek island and she has no idea why. Once she sees Sam, she is overcome with mixed emotions and breaks out into the title song “Mamma Mia” by ABBA. Audience members will soon learn why the three men from Donna’s past have arrived at the same time. Shows are being staged at the Capitol Theatre in downtown Union City this Friday through Sunday and Oct. 22-24.