Now this right here is what we call a power pair. At last night's iHeartRadio Music Awards in LA, Rihanna and Jennifer Lopez got their BFF on backstage — and we couldn't be more obsessed. Srsly. But what's more? They're both rocking epic '90s outfits. J. Lo took it back to her Jenny From the Block days in a form-fitting and fierce halter-neck Zuhair Murad dress teamed with stick-straight locks. Meanwhile, RiRi went goth-glam in Givenchy and Bantu knots, which we've loved since Gwen Stefani showed 'em off way back when. Ladies, nicely done. We want more of this duo.