Nina Thomas clearly isn't letting allegations that she swindled her ex, Earl Thomas, out of millions of dollars affect her personal life ... she attended Beyoncé's big concert Wednesday -- and it looked like she had a blast.
The estranged wife of the former Seattle Seahawks superstar hit up NRG Stadium for the Texans vs. Ravens Christmas game in Houston ... and rocked out to Queen Bey at halftime in some great seats.