"They are taking a break," an insider told Us Weekly. "It is because of busy schedules."
The 45-year-old singer and the Topshop heiress -- her father is British billionaire Philip Green -- were last seen together at the 2014 Grammy Awards on January 26. The couple was all smiles at the event, even walking the red carpet hand in hand.
Anthony, who has yet to finalize his divorce from Jennifer Lopez, was linked to model Shannon De Lima before he began dating Green. The "You Sang to Me" crooner has four children -- 5-year-old twins Max and Emme with Lopez, and sons Cristian, 13, and Ryan, 11, with ex-wife and former Miss Universe Dayanara Torres.