In pictures: Highs and lows of election night

Barack Obama has secured re-election as US President beating Republican challenger Mitt Romney. Here are the best pictures from election night:

Obama tweeted "four more years" after it became apparent he would secure re-election. The tweet - which featured a picture of Obama hugging wife Michelle - became the most retweeted in the history of the social networking site:

US election in pictures
Barack Obama tweeted a picture of him hugging Michelle after securing re-election. Credit: Twitter / @BarackObama

Obama told his supporters in his victory speech that the "best is yet to come" for America:

US election in pictures
Barack Obama on stage with his family after securing re-election. Credit: Jim Bourg / Reuters
US election in pictures
Obama addresses his supporters in Chicago. Credit: Philip Andrews / Reuters
US election in pictures
Confetti obscures the stage in Chicago. Credit: Philip Andrews / Reuters

Romance was in the air at Obama's victory party when Keesha Patterson proposed to her girlfriend Rowan Ha.

US election in pictures
Keesha Patterson proposes to girlfriend Rowan Ha at Obama election night victory party. Credit: Kevin Lamarque / Reuters

Romney made his concession speech where he urged to supporters to pray for the President and America:

US election in pictures
Mitt Romney delivers his concession speech. Credit: Reuters
US election in pictures
Romney exits the stage with his wife Ann. Credit: Mike Segar / Reuters

Musician Lady Gaga and Desperate Housewives actress Eva Longoria tweeted pictures of them celebrating Obama's win. Beyonce earlier shared a picture of her ballot paper on her Tumblr site:

US election in pictures
Lady Gaga celebrates Obama's re-election with friends. Credit: Twitter/@ladygaga
US election in pictures
Longoria tweeted: Me and my friends celebrating! I'm in tears! Moving the country forward!!! Obama!!! Credit: Twitter / @EvaLongoria
US election in pictures
Beyonce Knowles' ballot paper. Credit: iam.beyonce.com

There were mixed emotions for supporters of both candidates:

US election in pictures
Ajay Narayan cheers during the Nevada State Democrats' election night party in Las Vegas. Credit: Reuters
US election in pictures
Supporters react while watching results during Romney's election night rally in Boston. Credit: Reuters

The US election gained interest from across the world with events held in London, Beijing and Kenya:

US election in pictures
An election night party was held at the US embassy in London. Credit: US Embassy
US election in pictures
Guests at the US Presidential Results Event in Beijing pose with cut outs of the President and Mitt Romney. Credit: Reuters
US election in pictures
A man plays a guitar as he celebrates the victory of Obama in his ancestral home village of Nyangoma Kogelo in Kenya. Credit: Reuters