During the show, Katy took to the stage to perform "Part of Me," her new breakup song from the special edition of her album Teenage Dream: The Complete Confection.
And while Russell, who filed for divorce late last year, wasn't explicitly mentioned in Katy's ditty, the lyrics seemed to single out her ex...
"Days like this I wanna drive away/Pack my bags and watch your shadow fade/You chewed me up and spit me out/Like I was poison in your mouth," Katy started. "You took my light/You drained me down/But that was then and this is now."
Now, the most pointed lyrics?
"So you can keep the diamond ring/It don't mean anything/In fact you can keep everything, yeah yeah/Except for me," the 27-year-old pop star sang.
Turns out Katy swapped in the "diamond ring" bit just for her Grammys performance.
In the studio version of the song, the cat lover sings, "You can keep the dog for me/I never liked him anyway/In fact you can keep everything, yeah yeah/Except for me."
Despite this seemingly bitter performance, Katy and Russell finalized their divorce amicably. And while Russell was entitled to half of his higher-earning signifcant other's income throughout their 14-month-marriage, he terminated his rights to spousal support.
Check out Perry's Grammys performance below, and then tell us if you think this was a definite dig at her ex-husband.