It’s only been a couple of weeks since Rihanna was interviewed by Diane Sawyer on 20/20 in which she showed obvious signs that she was still hurting from her recent incidents with ex-boyfriend Chris Brown. But the “Russian Roulette” singer seems to be healing quite nicely. RiRi was spotted being “openly affectionate” with 90210 actor Tristan Wilds at a party she hosted in her L.A. home last...