Will Young, James Morrison and Scouting for Girls have signed up for London's Olympic Handover party.
The Feeling and McFly will also perform at the concert which is being held on The Mall - the well-known stretch of road leading to Buckingham Palace.
The gig, which marks the moment London becomes the official Olympic city, takes place at the same time as the Beijing 2008 Olympic Closing Ceremony.
London Mayor Boris Johnson will be symbolically handed the Olympic flag.
Sporting theme
"Being involved with the Olympic Handover celebrations, and playing in front of Buckingham Palace to thousands of people is going to be amazing," said singer-songwriter Morrison.
"This will truly be one of the most memorable events that we have ever performed at"
"It's one of those once in a life time opportunities and I am very excited."
Tickets for the concert on 24 August have already been allocated to 40,000 people via a ballot.
Anyone who was not fortunate enough to get one can tune in to the live broadcast on BBC One and BBC Radio 2.
The show will feature unique collaborations and specially-arranged performances, some with a sporting theme.
In a statement Scouting for Girls said: "This will truly be one of the most memorable events that we have ever performed at and we are so happy to be involved.
"Our nation should feel very proud to be the next host city for the Olympic and Paralympic Games."
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