Brandy serenaded her brother Ray J and his new bride, Princess Love, with Etta James' classic "At Last" for the couples' first dance as husband and wife.

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At one point, the two stopped dancing to admire Brandy's performance.

Ray J and Princess Love, who star on VH1's "Love & Hip Hop: Hollywood," were married on August 12 at the Vibiana in Los Angeles.

Brandy also served as Princess Love's maid of honor and posted a photo to Instagram of the two of them on the big day with the hashtag #sis.