Hugh Jackman performed an impromptu duet with girlfriend Sutton Foster during her concert in Idaho on Thursday, August 6. According to a video shared via social media, Jackman, 57, joined Foster, 51, on stage at the Sun Valley Music Festival in Ketchum, Idaho. The Broadway actress, who was the gala’s featured artist, wore a dazzling yellow sequin gown. The Oscar nominee opted for a classic blue suit. The couple sang the duet “A Million Dreams” from Jackman’s movie The Greatest Showman. (He performs the song with costar Michelle Williams in the hit 2017 musical.) “They can s...