Glen Keating and Greg Ryan debut at the top of the Irish chart this week with charity single 'The Munster Song'.

The track, which is raising funds for the Bluebell ABA school for autistic children in Raheen, County Limerick, pushes Flo Rida's 'Low' and Estelle's 'American Boy' down to second and third place respectively.

Chris Brown's 'With You' moves down one place to number four, while Mundy and Sharon Shannon's 'Galway Girl' sticks at number five.

Meanwhile, Britney Spears climbs up six places to number ten with her latest track 'Break The Ice'.

R.E.M.'s Accelerate debuts at the top of the album chart this week, followed by Mary Black's 25 Years 25 Songs at number two and Duffy's Rockferry at number three.

The top ten singles in full:

1. (-) Glen Keating & Greg Ryan: 'The Munster Song'
2. (1) Flo Rida ft. T-Pain: 'Low'
3. (2) Estelle ft. Kanye West: 'American Boy'
4. (3) Chris Brown: 'With You'
5. (5) Mundy & Sharon Shannon: 'Galway Girl'
6. (4) Duffy: 'Mercy'
7. (7) Leona Lewis: 'Better In Time'
8. (9) Madonna ft. Justin Timberlake: '4 Minutes'
9. (6) Basshunter: 'Now You're Gone'
10. (16) Britney Spears: 'Break The Ice'