'He's proud of his momma!' Underwood's husband, Mike Fisher, wrote on Instagram.
The two worked together on the anthem, "The Champion."
ET was with Clarkson on the red carpet ahead of the 2018 Radio Disney Music Awards, where she opened up about being pitted against her fellow 'American Idol' winner.
ET caught up with the 40-year-old rapper on the red carpet before the Radio Disney Music Awards on Friday, where he opened up about performing 'Champion' with Underwood.
She said the two singers don't know each other well but certainly don't have any sort of rivalry.
See which artists took home awards, including BTS, who had the biggest night of all!
The 35-year-old singer is being honored with the Hero Award at the event.
The former Nashville Predators player took on his wife's latest single.
Carrie Underwood won the night before the awards show even started!
The 35-year-old singer stunned during her performance of 'Cry Pretty' at the 2018 CMT Awards in Nashville on Wednesday, just before winning her 18th trophy.
The singer took home the award for Female Video of the Year at the 2018 CMT Awards.
'The Voice' coach took to Twitter to thank her pal for a gift that made her feel extra good.
The beloved 'Voice' coach took to Twitter on Tuesday to give a sweet shout-out to Carrie Underwood.
Jason Aldean, Dan + Shay, Florida Georgia Line and Little Big Town will also take the stage on June 6.
