The song, their first in eight years, was produced by Pharrell Williams, and co-written by Michelle Williams, James Fauntleroy and Lonny Bereal, who also handled vocal production with Beyonce.
On "Nuclear," the trio, who will be appearing together during the Super Bowl, pour their breathy vocals over the pretty-recognizable breakbeat, producing a throwback ballad reminiscent of early Janet Jackson.
Listen to "Nuclear" below.
Love Songs will be officially released on Jan. 29. Check out the tracklisting here.