Apparently, the Oscar winner isn't too cool for her co-stars: She was totally star struck by Ariana Grande while working on the upcoming movie Don't Look Up. Jennifer admitted she's basically Ari's biggest fan. "She can't make bad music," she shared during a Q&A for BAFTA voters, according to Variety. The Joy actress went on, "I've since reflected on my behaviour with Ariana Grande. I was so excited and nervous that at one point, I just kind of walked into her hotel room and sat down." It seems Jen is well aware that her behaviour towards the Thank u, next artist wasn't particularly chill. "I've just been thinking about it a lot lately," Jennifer recalled. Director Adam McKay even weighed in, saying, "She didn't like you." No mention of how J.Law fared working with Meryl Streep and Leonardo DiCaprio, but it sounds like she was able to keep her cool with everyone except for a certain Dangerous Woman.