What is the highest-charting song from The Isley Brothers?

"It's Your Thing" gave the Isley Brothers their highest-charting success, reaching number two on the Billboard Hot 100 in 1969. It was their first single after leaving Berry Gordy's Motown Records and the funky anthem was a sexual freedom anthem with a subtle middle finger to Gordy. Having been designated a second-tier group by their previous label, the chance to do their own thing proved to be the right move. Not only was "It's Your Thing" a certified bop, it was their first song to win a Grammy too.