About All You Need to Know (feat. Calle Lehmann)

"All You Need to Know" is a song by American DJ and producer Gryffin and American DJ duo Slander featuring Swedish singer-songwriter Calle Lehmann. It was released on March 27, 2019, as the first single from his studio album Gravity.

"All You Need to Know" is Gryffin's first collaboration with the DJ duo Slander and Swedish singer-songwriter Calle Lehmann. Lehmann previously featured on Galantis' track "Mama Look at Me Now" and co-wrote "Slow" for Liam Payne and "Don't Threaten Me with a Good Time" for Panic! at the Disco. The website Bass Stud remarked on the song's "warm textures and hypnotic drop", and felt that the track "merges Gryffin's melodic genius and Slander's artful basslines and immaculate sound design, and Calle Lehmann infuses each line with his undeniably lovely vocals, resulting in a track that's soaring and euphoric".