The Maroon 5 frontman, who is set to marry the Namibian model in Mexico next month, admitted he was very nervous about asking her church minister dad's for his blessing.
The 34-year-old singer told 'On Air With Ryan Seacrest' today (16.06.14): ''I did ask his permission. I don't want to talk about it, you know how I am, but yes, of course I did. I had to. And it was extremely nerve-wracking.''
The 'Voice' USA mentor popped the question to the 25-year-old beauty in July 2013, following a brief split last year.
The couple first started dating in May 2012, just one month after Adam was dumped by Behati's Victoria's Secret colleague Anne V after two years of dating.
The 'One More Night' hitmaker enjoyed a brief romance with 22-year-old model Nina Agdal in May last year during his time apart from Behati, but they soon reunited and announced their engagement.
A source said at the time: ''He realised he really does love her and she was the one.''
Another insider recently claimed that Adam was keen to make amends with his scorned ex-girlfriends before his big day and sent them all letters to apologise for his behaviour during their time together.
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