Music Katy Perry Leaves Sweet Comment on Ex-Boyfriend John Mayer's Instagram for His Dad's 90th Birthday: Pic! By Alex Ungerman 12:30 PM PDT, October 12, 2017 This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page. 12:18John Mayer Reveals His New Music Is About Ex Katy Perry: 'Who El…01:06'East New York’s Amanda Warren Explains How Her Own Fiancé Train…01:04T.J. Holmes and Amy Robach's ABC Fates Unknown as Workplace Inve…03:19Pete Davidson and Chase Sui Wonders 'Spending a Lot of Time Toge…02:42Bonnie Bartlett Recalls Past Open Marriage With 'Boy Meets World…02:30Hailey Bieber Debuts New Short Bob Hairstyle05:58Debbie Matenopoulos Tears Up Sharing Barbara Walters' Final Word…02:44Amy Robach and Her Estranged Husband Spotted Together Amid T.J. …01:22Hoda Kotb and Savannah Guthrie Gush Over Al Roker's 'Today' Retu…03:18Willie Geist Says Al Roker’s 'the Heart and Soul' of 'Today' Fol…05:06Jeremy Allen White on Blacking Out During Golden Globe Win (Excl…02:31Anne Hathaway’s Dancing Queen Moment Goes Viral at Paris Fashion…02:20Pete Davidson and Chase Sui Wonders Kiss During Amusement Park D…03:32Lisa Marie Presley's Death: 911 Call Reveals Distressing Scene B…03:00Tom Hanks Clarifies 'Nepo Baby’ Comments and Praises Children as…01:46Tom Hanks and Rita Wilson Celebrate Son Truman Joining the ‘Fami…02:05Michael Jackson's Nephew Jaafar Jackson to Play King of Pop in U…02:47Ellen DeGeneres Shares Scary Video as Hometown Is Evacuated Amid…02:49Pamela Anderson Claims Sylvester Stallone Offered Her a Condo an… Katy Perry's still got love for her ex -- and his family! The Witness singer left a comment on John Mayer's Instagram on Wednesday after The Search for Everything singer-songwriter shared a sweet snap of him and his dad in honor of his pop's 90th birthday. "Happy 90th Birthday, Dad! Leave doting comments about my dad below," Mayer, 39, captioned the pic. "He’ll love scrolling through it. Also please stop this train. Thank you."View this post on InstagramA post shared by John Mayer (@johnmayer) MORE: Russell Brand Says Marriage to Katy Perry Was 'Very Wonderful,' Wishes Her 'All the Best' "Looking fantastic as ever!" Perry commented. "Happy birthday friend."instagram.com/johnmayer MORE: John Mayer Responds to Katy Perry Calling Him the 'Best Lover' She's Ever Had A happy 90 years, indeed!Mayer, who openly spoke about his former flame's influence on his most recent work earlier this summer, shared what song about an ex makes him so sad, he can't play it live anymore.Watch the video below to find out which one.John Mayer Reveals His New Music Is About Ex Katy Perry: 'Who Else Would I Be Thinking About?' This video is unavailable because we were unable to load a message from our sponsors. If you are using ad-blocking software, please disable it and reload the page.