Selena Gomez uploaded a charming Instagram picture of herself strumming a guitar while sitting at home this Tuesday.The 28-year-old was sitting comfortably in an armchair that was tucked away in a sunlit corner of her new $4.9 million Encino mansion.Her six-bedroom home was originally designed by the late Tom Petty and his then-wife Jane Benyo back in the late 1980s.