Despite snubbing a Thursday night photocall with the humantarian icon in favor of a trip to the liquor store, Amy Winehouse has big plans for her performance at the festival celebration for Nelson Mandela’s 90th birthday celebration in London’s Hyde Parkm Friday night.

“The rehearsals for the Mandela show have been going so well, her people are ­worried she’ll go over her ­allotted two-song time slot….She’s planning to do Love Is A Losing Game and Tears Dry On Their Own, but has hinted she’ll sing Happy Birthday to Mandela like Marilyn Monroe once sang to John F Kennedy.”

The Mandela Birthday Concert, to also feature Will Smith and Leona Lewis, will be broadcast live in the UK, the U.S, and Africa.