Comedian Rowland Rivron's victory in the BBC One charity show, which had US superstar Katy Perry as special guest performer, was seen by an average of 5.7m (25.8%) between 7.15pm and 8.50pm.
Let's Dance for Sport Relief, despite being TV's most-watched show yesterday, is down on 2010's finale by 1.4m.
In general, BBC One's evening panned out similarly to last week, with Dale Winton's In It To Win It (5.64m/25%) and Casualty (5.03m/24.1%) both winning their slots.
Tabloid controversy boosted Take Me Out to over 5m, with 4.79m (21%) and 331k (1.5%) on ITV1 +1, overall growing an impressive 560k week-on-week, despite clashing with the last 50 minutes of Let's Dance.
The Jonathan Ross Show ended on a whimper with just 2.81m (12.9%) tuning in on ITV1 from 9.15pm (+1: 257k/1.5%). Graham Norton's BBC One chat show has been consistently rating better in Ross's old late Friday Night slot.
The Harry Hill hour made its penultimate outing, attracting almost identical audiences of 4.64m (22.2%) for You've Been Framed at 7pm (+1: 255k/1.1%) and 4.7m (22.6%) at 7.30pm (+1: 251k/1.1%) for TV Burp.
On the other terrestrials, CSI: NY (1.46m/6.6%) and Law & Order: SVU (1m/5.2%) helped Channel 5 claim victory over BBC Two and Channel 4, both of which underperformed.
Overall, BBC One led primetime with 25.2%, beating ITV1's 17.4% (+1: 1.2%). Channel 5 was third with 5.2% (+1: 0.2%), pipping BBC Two's 5.2% and Channel 4's 4.1% (+1: 0.8%).
BARB ratings data supplied by Attentional