Labrinth featuring Emeli Sande are spending a second week at number two with Beneath Your Beautiful.
Smith's score will feature a new track, called Here It Comes, that Sande has co-written and appears on.
Sande's competition for best song musically and lyrically comes from Bat for Lashes' Laura and Jake Bugg's Two Fingers.
In a nearby courtyard, Scott Sande, a Mets fan from Newport News, Va.
"It blew me away, " label head Kiran Sande said of the first time he heard the hitherto forgotten music.
This week Tiny Dancer outsold entries from Labrinth, Emeli Sande, Rihanna, Olly Murs and One Direction in the Irish Charts.
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The group joins acts already announced on the bill like Emele Sande, The Script, Two Door Cinema Club and Alt-J.
Singer Emeli Sande was the big winner at the Mobo Awards, taking three prizes at the music ceremony in Liverpool.
Elsewhere in the official singles chart Brit award-winner Emeli Sande's Read All About It Part 3 is this week's highest climber.
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Scottish singer-songwriter Emeli Sande has already been announced as the recipient of this year's Critics Choice award, which recognises up-and-coming talent.
And in the best British female category, Winehouse and Sande are listed alongside Paloma Faith, Bat For Lashes and Jessie Ware.
They join the likes of Jake Bugg, The Script, Bloc Party, Paloma Faith, The Maccabees, Emeli Sande, Ben Howard, Ellie Goulding, and Blondie.
Double Brit winner Emeli Sande could be in line for further accolades, having been nominated for two prizes at next month's Ivor Novello awards.
The charity cover of Tiny Dancer had previously outsold entries from Labrinth, Emeli Sande, Rihanna, Olly Murs and One Direction in the Irish charts.
Sande's Our Version of Events was the top-selling music title by some considerable distance, aside from two "Now That's What I Call Music" compilations.
The Boomtown Rats are joined on the festival's line-up by their contemporaries Blondie, along with more up-and-coming acts like Jake Bugg and Emeli Sande.
At the launch, in London's Savoy Hotel on Thursday, Sande handed over this year's Critics' Choice prize to Sussex-born pianist and songwriter Tom Odell.
The top two albums remained unchanged from last week, with Emeli Sande's Our Version Of Events at number one, above Babel by Mumford and Sons.
Emeli Sande's collaboration with Labrinth, Beneath You're Beautiful, is at four, with Alicia Keys scoring a new entry at number five with Girl On Fire.
Sande, who performed at both the London 2012 opening and closing ceremonies, won two Brits earlier this month, for best British female and best British album.
The 22-year-old, from West Sussex, follows in the footsteps of Adele, Emeli Sande and Jessie J - who were all tipped for success by Brits' voters.
Rick Smith, one half of British dance act Underworld, will be heard on the score of Danny Boyle's new film Trance alongside double Brit-winning singer Emeli Sande.
Sales of Sande's Our Version Of Events rose to 1.6 million returning to peak position for a ninth non-consecutive week since its release over a year ago.
The ceremony will be hosted by actor James Corden and will feature performances from Muse, Robbie Williams, Emeli Sande, Mumford and Sons, Ben Howard and One Direction.
One Direction, Rihanna and Emeli Sande performed on Sunday night.
Legal UK sales of his album in the first half of 2012 hit the 448, 000 mark - making it the fourth most popular album behind releases from Adele, Emeli Sande and Lana Del Rey.
Emeli Sande, who picked up three Mobos at the weekend, slipped back into second place in the singles chart with Beneath Your Beautiful, while Adele's James Bond theme tune Skyfall made the top five.
Other guests included pop star Emeli Sande, Duwayne Brooks - Stephen's friend who was with him on the night that he died - and lawyers Imran Khan and Michael Mansfield who have represented the Lawrence family throughout their battle for justice.
BBC: Stephen Lawrence 20th anniversary memorial service held
Sande had become known for her songwriting - Cher Lloyd, Susan Boyle, Gabrielle, Rihanna, Leona Lewis, Alesha Dixon, Cheryl Cole and Tinie Tempah are among those to have benefitted from her talents - before signing a solo recording deal of her own.
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