"Where Are Ü Now", a collaboration with Skrillex and Diplo released in 2015, marked a new era of Bieber's career, as he transitioned into EDM. The song earned him a Grammy Award for Best Dance Recording. In late 2015, Bieber's fourth studio album Purpose was released, which became his most commercially successful album. It produced three Billboard Hot 100 number-one singles: "What Do You Mean?", "Sorry", and "Love Yourself". After the release of Purpose, Bieber had featured on several successful collaborations, including "Cold Water", "Let Me Love You", "Despacito (Remix)", "I'm the One", "I Don't Care" and "10,000 Hours", all of which went top five in the US. After taking some time off to focus on his marriage to Hailey Baldwin, as well as facing complications with Lyme disease, Bieber released his fifth studio album, Changes. It became his seventh chart-topper in the US, making him, at the age of 25, the youngest solo artist to achieve seven number-one albums in the US.