On Monday night, the Mail understands, Britney had been invited to Beyonce's opening show at the O2, and the party afterwards.
However she apparently decided to spend the night in.
She stayed at the Mandarin Hotel where her two sons - Sean Preston, three, and Jayden-James, two - were tucked up in bed under the watchful eye of nannies by 8pm.
Miss Spears has kept an extraordinarily low profile on this trip to London, apparently on the advice of record label executives well aware that she is at the last chance saloon after her recent fall from grace.
Her security team has been so keen for her not to be photographed they have employed a lookalike to divert attention whenever Miss Spears and her family leave the hotel.