| Youth career | |||
|---|---|---|---|
| –1998 | Godmanchester Rovers | ||
| 1998–2001 | Ipswich Town | ||
| Senior career* | |||
| Years | Team | Apps | (Gls) |
| 2001–2005 | Ipswich Town | 122 | (48) |
| 2005–2007 | Charlton Athletic | 68 | (31) |
| 2007–2009 | Tottenham Hotspur | 60 | (18) |
| 2009–2011 | Sunderland | 58 | (32) |
| 2011–2015 | Aston Villa | 61 | (21) |
| 2013–2014 | → Fulham (loan) | 24 | (3) |
| 2014 | → Brighton & Hove Albion (loan) | 5 | (2) |
| 2015 | → Derby County (loan) | 15 | (10) |
| 2015–2018 | Derby County | 58 | (12) |
| 2018 | → Burton Albion (loan) | 15 | (2) |
| Total | 486 | (179) | |
| International career | |||
| 1999–2000 | England U15 | 8 | (7) |
| 2000–2001 | England U16 | 11 | (3) |
| 2002 | England U19 | 3 | (3) |
| 2003–2005 | England U21 | 14 | (9) |
| 2006–2011 | England | 13 | (4) |
| *Club domestic league appearances and goals | |||