An investigation has been launched into the fire that set Cara Delevingne’s $7 million home ablaze. A Los Angeles Fire Department spokesperson told RadarOnline.com that they have their best investigations on site, rummaging through the damage and collecting witness statements to see if arson played a role in the horrific incident. As this outlet reported, Delevingne’s $7 million mansion in Studio City, CA, went up in flames on Friday just before 4 AM. 94 firefighters and 13 fire trucks were dispatched to the scene, and it took nearly two hours to control the blaze. RadarOnline.com is told that…