This is the fourth year the award has been given to recognise the most impressive performance by a player in Twenty20 Internationals during the 12-month voting period and it continues to mark the advent of this exciting format of the game at international level.
On 26 December 2010, during the Black Caps' Twenty20 International match against Pakistan in Auckland, Southee ripped through the Pakistani top order in a performance that saw him take 5-18 in his four overs including one maiden. He also claimed a catch to dismiss the then Pakistan captain Shahid Afridi and the side went on to win the game by five wickets.
According the LG ICC Awards' 25-person voting academy Southee's effort was the most impressive of the voting period from 11 August 2010 to 3 August 2011.
It beat competition from England's Tim Bresnan for his four wickets for three runs against Pakistan in Cardiff in September 2010; South Africa's JP Duminy for his 96 not out in 54 balls against Zimbabwe in Kimberley on 10 October 2010 and Australia's Shane Watson for his 59 runs in 31 balls against England in Adelaide 12 January 2011.
The 22-year-old from Whangerai was unable to attend the awards but upon hearing the news he said: "I'm sorry I'm unable to attend the awards and it's a great privilege to accept the ICC Twenty 20 Performance of the Year. Looking at the nominees it's a great achievement to have even been nominated and to win it is something I will never forget.
"Looking back at the game which has won me the award, it was Boxing Day in a full house at Eden Park and it was a big game for us as we'd been going through a rough patch of losing, something like 12 or 13 games lost on the trot and it was our first win in a long time. It was great to be able to contribute to that win and also put in a great performance."
The Twenty20 International Performance of the Year was one of 10 individual honours handed out during the LG ICC Awards in association with FICA. The event, held at Grosvenor House Hotel, London recognises cricket's star performers over a 12-month period.
Based on the period between 11 August 2010 and 3 August 2011, the LG ICC Awards 2011 ? presented in association with FICA ? take into account performances by players and officials in a remarkable period for the game.
That period includes such high-profile events as the ICC Cricket World Cup 2011 in India, Bangladesh and Sri Lanka, the ICC Intercontinental Cup final, several ICC World Cricket Leagues as well as several bilateral Test and ODI series.
The LG ICC Awards ceremony is now in its eighth year and this year it is being held in London, England. Previous ceremonies were held in London (2004), Sydney (2005), Mumbai (2006), Johannesburg (2007 and 2009), Dubai (2008) and Bengaluru (2010).