The 31 year-old singer recently became the subject of a number of tabloids when a woman came forward claiming she was having an affair with Blackstock and was five months pregnant with his child.
Nevertheless, Clarkson finally spoke out against the rumors on Friday, taking to Twitter to deny the allegations.
She writes, "Keep hearing random rumors of me & Brandon splitting or that's he's cheating on me. Stop with all the ...
It's been two-and-a-half years since she released viral hit "Friday," and she took to her YouTube page the day after Thanksgiving (aka "Black Friday" -- get it?) to watch the video for the first time in a long while.
The 16-year-old aspiring singer found it somewhat embarassing because her whole family, all of her friends and one bad hair do all made appearances.
"'Friday' was something that completely changed my life and as much as even I laugh at it, it's not something that I regret doing she said in her Black Friday message.