‘It Was Really Nerve-Racking’: Anne Hathaway Reveals How Russell Crowe Forced Her To Sing It may not be the most obvious way to bond with your co-stars, but that didn’t stop Russell Crowe from throwing a few karaoke parties. The 48-year-old actor ensured that he and the cast of ‘Les Misérables’ made the most of their time together, by inviting them over to his house every Friday night during filming.Russell’s co-star, Anne Hathaway, spilled the beans about what went on at Russell’s house and revealed she wasn’t the first guest to grab the microphone.“It was really nerve-racking at first. The first time Russell said we were going to sing, I thought he was joking. Or that we could just get him drunk enough and he would forget,” the ‘One Day’ star told the New York Post.“Roberta Duchak, his voice coach, was there, and there was a songbook that we would look through. There were a lot of duets.”However, it wasn’t just duets that were being performed in Russell’s living room, as Anne also revealed that the group would warm up by singing ‘Hallelujah’ together.Their co-star, Hugh Jackman, was also present for the karaoke parties and admitted that Russell loved to use musical instruments during his performances.“You know Russell loves to do a bit of Johnny Cash,” Hugh said. “You basically have to give Russell 30 seconds before he breaks out the guitar. He loves it, loves the sing-along.”The two actors perform a number of duets together in the new film, which is based on the novel by Victor Hugo, so it seems karaoke really was the best way for them to pratice.