Adam Levine was ''flooded with emotion'' upon his reunion with new fiancée Behati Prinsloo.

The Maroon 5 frontman announced his surprise engagement to the brunette beauty on Tuesday (16.07.13) after they had split earlier this year, and it is thought the singer was determined to win her back after having an epiphany.

A source told website Us Weekly: ''Adam kept talking to Behati and was flooded with emotion when they saw each other again. He knew he wanted to propose.''

The 34-year-old star was spotted on holiday with Sports Illustrated swimsuit model Nina Agdal last month, but it appears the romance was short-lived because Adam was still besotted with Behati, 24.

An insider said: ''The Nina thing was not that serious and was not going to last. After Adam broke up with Behati, he couldn't stop thinking about her. He realised he really loved her and wanted to be with her.''

'The Voice' USA coach reunited with Behati following his brief fling with Nina and proposed to the Victoria's Secret stunner over the weekend.

The lovestruck couple - who first began dating in May 2012 and split earlier this year - celebrated their engagement in New York City last night, where they were spotted ''canoodling'' over a romantic meal at Peels restaurant.