"Oh my God, Justin Timberlake just said my name," the actress told PEOPLE of her reaction to her Golden Globes nomination, which was announced Tuesday morning by the handsome singer. "I'm so very excited to come into this because I'm usually on the other side. I'm a fangirl and I watch these things happen, but they don't happen to me!"
Sidibe, a self-professed 'N Sync fanatic, might be as excited about its delivery as the news itself. "I told my roommate, and I literally said, 'Oh my God, Justin just said my name,'" she said. "He finally said my name."
The actress, who will join Emily Blunt, Sandra Bullock, Carey Mulligan and Helen Mirren as a nominee for best actress in a motion picture (drama), said her family is revving up for the dream-come-true reality as well.
"I called my mom right away when I found out and she was really excited. She said that six people have called her already to congratulate her," Sidibe said of Tuesday's announcements. "My dad's not really into this whole thing. He doesn't really understand what all this is, it's not his realm at all, but I'm going to tell him when I see him later today."
About what she's going to wear to the Golden Globes, Sidibe said she hasn't had a chance to think about all the logistics just yet.
"I'm thinking maybe a mermaid dress? I have no idea," she said. "But oh gosh, that's something I need to think about! I'm just really, really proud of what the film has done and what it's done for me and what we're doing for the people who need it."
And her plans for the rest of the day?
"I'm going to do everything that I planned to do yesterday, only I'll be smiling a little bit harder."