Edge went on to solidify himself as an emerging singles competitor by winning the 2001 King of the Ring tournament and becoming a face by siding with the WWF during the Invasion storyline. Christian betrayed Edge shortly afterward, and the two feuded over Edge's Intercontinental Championship (which he won at SummerSlam) that he later lost to Christian at Unforgiven, though Edge later captured the title in a ladder match at No Mercy. Following this, Edge lost the Intercontinental title to Test and shortly afterwards won the WCW United States Championship from Kurt Angle. On November 3 at Rebellion, Edge defeated Christian in a Steel cage match to retain the Intercontinental Championship, then Edge defeated Test at Survivor Series to unify the Intercontinental Championship with the United States Championship. From there, Edge was placed in a feud with William Regal for the Intercontinental Championship. Edge first defeated Regal at Vengeance to retain the championship: however, he would come up short in the new year, losing the title to Regal at the Royal Rumble and then coming up short in his rematch against Regal at No Way Out in a Brass Knuckles on a Pole match. On the March 3 episode of "Sunday Night Heat", Edge defeated Mr. Perfect, and at WrestleMania X8, Edge found himself in a match with Booker T that was the result of Edge beating out Booker for a fictitious Japanese shampoo endorsement. Shortly after defeating Booker at WrestleMania, Edge was drafted to the SmackDown! brand in the first . During this time, Edge also gained Never Gonna Stop (The Red Red Kroovy) by Rob Zombie as his new entrance theme.