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.
The actor opened up about his 'Song To Song' experience with Patti Smith at SXSW.
They'll be in the continent well into next year.
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