First comes Instagram flirting.  Then comes getting photographed together…and finally comes a quicky engagement.Nick Jonas + Priyanka Chopra are engaged after two months of dating.  Jonas, 25 proposed to the former Quantico star at her 36th birthday party in London.  The two were first photographed at the Met Gala in May followed by some serious IG flirting.  Nick reportedly shut down the Tiffany & Co. store in New York City to buy an engagement ring. Nick + Priyanka have met each other’s families in the last few weeks. Jonas has had his share of famous flings.  His ex-list includes Cranston’s own Olivia Culpo, Miley Cyrus and Kate Hudson