South Africa swept to a comprehensive nine-wicket victory over England in the second Twenty20 to seal a 2-0 series win.
AB de Villiers smashed 71 off 29 balls and Hashim Amla an unbeaten 69 off 38 as the hosts chased down 172 with 5.2 overs to spare in Johannesburg.
England lost their last seven wickets for 14 runs as they were bowled out for 171 despite Jos Buttler's 28-ball 54.
Eoin Morgan made 38 and Joe Root 34, while Chris Morris claimed 3-26.
Defeat was England's fifth in succession in limited-overs cricket, and means they ended a tour on which they won the Test series with losses in both the one-day and T20 series.
It was their final competitive game before the World Twenty20 in India starts on 8 March, while South Africa face Australia in a three-match T20 campaign on home soil from 4 March.