Rumors are flying around the internet saying that Katy Perry and John Mayer dating might have gone deeper leading to become lovers again?

The first rumor popped out when that the former couple was spotted having dinner at the Beverly Hills home of a friend. Based on a Refinery 29 article, The Daily Mail claimed that the evening ended in a sleepover.

After this rumor roared, following event that happened on Thursday made this speculation even more intense. "Roar" singer Perry and "Gravity" singer Mayer were spotted again at the Hollywood restaurant Tower Bar. An insider told Page Six, "Katy Perry and John Mayer walked in together, arm in arm, and the whole room literally fell silent."

In the same event, there were also some celebrities present in the same restaurant including Lee Daniels, who was having dinner with Naomi Campbell, Scarlett Johansson, Reese Witherspoon and Clint Eastwood.

As per Refinery, the couple brokeup on February 2014. After that, the pop diva became busy with her Prismatic World Tour.

Blast from the past, John Mayer had a relationship with Taylor Swift. T-Swizzle reportedly has a feud with Katy since last year. She wrote a song about John Mayer breakup and even wrote a song about her feud with Perry titled "Bad Blood." Swift is known for writing songs based on her experiences. Is there a possibility that she will write a song about alleged "back together" couple since they have some issues before?

Last year, "Firework" singer and "Shake It Off" singer were reportedly at war. According to the report of TMZ, the war began on dancers issue as T.Swift believed Perry is a thief as her three dancers left her to join Katy's tour.

Well, check out this video and reminisce T.Swift and Perry performing in one stage.