The song "All Night Long (All Night)" is sung by Lionel Richie. It was released in 1983 as part of his album Can't Slow Down and became a worldwide hit, known for its blend of pop and reggae influences

. Lionel Richie also co-wrote and produced the song. There are other songs titled "All Night Long" by different artists, such as a 2024 track by Kungs, David Guetta, and Izzy Bizu, but the most famous and commonly referenced "All Night Long (All Night)" is by Lionel Richie

. Therefore, if you are referring to the iconic and widely recognized song "All Night Long (All Night)," it is sung by Lionel Richie