Fans who now want to keep track of Allen's happenings on the photo-sharing platform will now need to be approved by her.
At the top of her page, it still shows that the pop star has 725,000 followers and that she follows 1,090 pages, but it now states that the account is private.
It adds to speculation that's been building over recent months that her four-year marriage to Sam Cooper is on the rocks, after she was pictured just before Christmas without her ring.
Cooper, a builder and decorator by trade, is rumoured to have moved out of the family home he shares with Allen and their two children, Ethel (4) and Marnie (3).
