Sam Asghari is "humbled" by Britney Spears.

Sam Asghari and Britney Spears

Sam Asghari and Britney Spears

The personal trainer posted a gushing message to the 'Toxic' hitmaker, who he has been dating since the pair met on the set of Britney's raunchy music video 'Slumber Party'.

Captioning a string of pictures of the blonde beauty, Sam wrote: "Not going to wait until tomorrow to express my love for the one that humbles me women crush ( not only on Wednesday's) but everyday. #shehumblesme (sic)"

Meanwhile, Britney admitted she feels like "the luckiest girl in the world" to be celebrating her one year anniversary with boyfriend Sam Asghari.

Taking to Instagram in February, she wrote: "I've been with this man for over a year... everyday he inspires me to be a better person and that makes me feel like the luckiest girl in the world!! @samasghari (sic)"

Sam reposted the picture and message, and responded: "The most beautiful girl @britneyspears. (sic)"

The 36-year-old singer previously revealed how she first met her beau.

She shared: "We were doing the scene where I was doing the walk scene through the hall to go through the door to go to the bedroom and we were sitting there and waiting and waiting together for like 20 minutes at a time. We were having to be literally stuck there together, so we were basically forced to talk to each other ... I kept his number, and it was so weird - it was like five months later, and I found his number in my bag. I was like, 'He is really cute. This guy is really cute.' So then I called him, and ever since then ... He is just a really fun, funny person."

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