Lady Gaga, Rihanna And Katy Perry Celebrate US President Barack Obama's Election Victory

7 November 2012, 07:57 | Updated: 7 November 2012, 11:17

The music world has been reacting to the news that the American leader will remain in power for the next four years.

Lady Gaga was among one of the first stars to take to Twitter to offer her congratulations to Barack Obama after his US Presidential election victory.

The 'Bad Romance' star had been performing in Columbia on her 'Born This Way Ball' world tour when the news was announced.

She tweeted: "I JUST GOT OFF STAGE IN COLUMBIA!! CONGRATULATIONS MR. PRESIDENT @BarackObama We are so proud to be American tonight! YES!!! YES! YES!!"

After posting a picture with her friends, she added: "we just couldn't be happier my goodness, the joy when freedom prevails."

She also took a moment to congratulate Tammy Baldwin – who was elected as the first ever openly gay senator in Wisconsin.

"And to @TammyBaldwinWI for being elected the first openly gay senator in the HISTORY of The United States. #inspiring #brave #courageous," she wrote. 

Bajan star Rihanna was equally vocal on her social networking account as she tweeted: "Put one in da air for the Prez!!!! Our dear Obama!"

Katy Perry, who has been performing at rallies for the President for the past month, added: "The people have the power! Proud to stand by you for 4 more years." 

Justin Bieber was also voicing his opinion as he wrote: "alot of emotions right now. congrats President Obama...Im Canadian. Im good. #FreeHealthcare :)"

Barack Obama defeated republican candidate Mitt Romney in what was believed to be a tightly fought contest, although results suggest the margin of victory is expected to be around 303 to Mitt's 203 in the Electoral College Vote.