"I'm so sorry for all the chaos this has caused some of you," Hayley Williams wrote in a statement
The pro basketballer stole the show at one of the band’s recent gigs
The band just wrapped touring with Paramore earlier this week
"I have a lung infection you soft shit!"
Four gigs on the band's North American tour were postponed this week due to illness
The band are scheduled to return to the stage tonight
Both appeared on stage during the encore
The band also performed a cover of Beyoncé’s ‘I Miss You’ during the set
The moment took place during their recent show in Houston
"Since Speak Now was all about my songwriting, I decided to go to the artists who I feel influenced me most powerfully as a lyricist at that time"