Taylor Swift and Travis Kelce stepped out in Vegas together this weekend, to attend fellow Kansas City Chiefs player, Patrick Mahomes’ charity gala. Not only did they look stunning together, but Kelce referred to the singer as his ‘significant other’ and fans couldn’t cope. The celebrity couple were spotted hand in hand at the event, the fourth annual PatrickMahomes 15 and the Mahomies FoundationGala. Since Taylor Swift and Travis Kelce started dating, the singer has gotten close to Mahomes’ wife, Brittany. The foursome was spotted on a double date in Vegas before the event, throwing it back t…