Britney Spears' fiancé Sam Asghari just made a big promise to her fans. Asghari, 27, reposted a comment he received on Instagram from one of the "Gimme More" singer's fans that read, "@samasghari, TAKE CARE OF OUR GIRL." The actor and fitness trainer responded on his Instagram Story, writing, "I GOT YOU AMERICA" with various emojis.