They're Mamma Mia!'s "Dancing Queens." Karen Mason, Louise Pitre and Judy Kaye led their cast in the aforementioned ABBA hit at Broadway on Broadway Sept. 11. Brooke Shields, who starred in Grease! and currently plays Sally Bowles in the Roundabout's revival of Cabaret, hosted the 10th annual Broadway on Broadway concert, staged at 43rd and 44th Streets. Performances included "Lullaby of Broadway" from 42nd Street, "My White Knight" warbled by The Music Man's Rebecca Luker; "Run Freedom Run" from the Urinetown ensemble, and the comic rouser from Aida, "Strongest Suit."
