Kelly Clarkson has offered her support in a thoughtful social media tribute to her good friend and co-star on The Voice, Ed Sheeran.MORE: Kelly Clarkson wears edgy zip-up dress in her sleekest look yetTaking to Instagram on Monday, the award-winning singer shared a photo of herself and Ed, alongside a series of three love heart emojis, following the news that he has Covid.Ed is due to appear as a mentor on The Voice on the upcoming Knockout round, which was pre-recorded, meaning he will still