“We’re friends again – we text, and we’re cool,” Love says of Grohl in the above clip, reconfirming her recent comments that they’d buried the hatchet after years of Nirvana-related lawsuits and public feuding. And she agrees with Letterman that this renewed friendship boils down to maturity and wisdom. “I think you just get to an age where, ‘Why are we suing each other? Really?'” she continues. “It just got stupid. Honestly, me and Dave Grohl, we had some gnarly times over 20 years. And if we can make up, anyone can make up. We’re really cool now.”

Love says that Frances Bean Cobain – her 22-year-old daughter with late Nirvana frontman Kurt Cobain – did a “brilliant” job executive producing Montage of Heck. “It’s anguish,” Love says of watching the documentary. “It’s very moving. I’ve seen it now three times, and I’m probably not going to see it again. It’s too much. . . The director, Brett Morgen, did a fantastic job on it. I trusted him completely, kind of like I do with Lee Daniels on Empire. But I did trust him completely and gave him the keys to my storage and just said, ‘Tell the truth.'”

Love will make her Empire debut during the series’ sixth episode, “Out, Damned Spot,” which airs tonight, February 11th, on Fox. The musician-actress will play hard rock singer Elle Dallas, a member of the Empire Entertainment family, and perform a raspy cover of Al Green’s classic “Take Me to the River.”