Which song was released as the official lead single for Robbie Williams' album "Swings Both Way"?

Explanation

"Swings Both Way" is the tenth studio album by British singer-songwriter Robbie Williams. The album was released on 15 November 2013, and is Williams's second swing album after 2001's Swing When You're Winning. The album features duets with Lily Allen, Olly Murs, Rufus Wainwright, Kelly Clarkson and Michael Bublé, on classic as well as new material. "Shine My Shoes" was released as a promotional single and "Go Gentle" was released as the album's official lead single.