From Los Angeles to London, pop's biggest stars gathered virtually on Saturday to appear during Lady Gaga's Global Citizen One World: Together at Home concert on ABC.But while fans tuned in for the music, they also got the chance to take a look inside their favorite artist's luxury quarantine digs.And while an obvious effort had been made to downplay the opulence of the A-list mansions - there was a distinct lack of swimming pools - it was hard to hide the rather fabulous nature of their homes.From chatshow superstar Ellen DeGeneres's luscious landscaping, to Elton John's backyard basktball hoops, to John Legends's Egot award collection, there was plenty for the nosy to admire.