• Katy Perry and John Mayer

Katy Perry and John Mayer (Photo : Reuters)

Katy Perry, 30, the most followed person on Twitter, recently took to Instagram to share aphoto of herself wearing a necklace with the word "MOM." This has sparked rumors that she is pregnant.

In February, Perry reportedly reconciled with her former boyfriend John Mayer.

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"The buzz in her close group of friends is that she's two months pregnant," a source close to Perry told OK! Magazine.  

Meanwhile, a viral video features a dog singing Perry's "Roar."

Indeed, Caitlin Buckingham has one unique dog named Sacha.

In a video posted by Buckingham on Vine, Sacha sings along with Perry in the part when the title is mentioned in the chorus of the hit song "Roar." In the six-second clip, the white dog is apparently in a moving vehicle while listening to the song.

Since it was posted on Vine on Nov. 7, 2014, the video titled "sacha can sing?" with the hashtags #samoyed #dog #singingcover #singing has gone viral.

"Roar" was from Perry's fourth studio album titled "Prism," which was released in 2013. It was co-written by Perry with Dr. Luxe, Max Martin, Bonnie McKee and Cirkut. The power pop song's lyrics talk about self-empowerment.

Perry's very first song that ranked number one on Billboard Hot 100 is "I Kissed A Girl." It was followed by "California Gurls" featuring Snoop Dogg, "Teenage Dream," "Firework," "Last Friday Night (T.G.I.F.)," "Part Of Me," "Roar" and "Dark Horse" featuring Juicy J, who was said to retire after his "Pure THC: The Hustle Continues" album, according to Memphis Flyer.

Perry's latest single "This Is How We Do" peaked only at number 24 on Billboard Hot 100.   

Whether Perry and Mayer are back together, Sacha the dog singing "Roar" is just too cute for them to not watch.