Looks like Judd Apatow has gotten too used to dancing on his own. While accepting a Peabody Award at the Waldorf Astoria on Monday, the Girls executive producer admitted that he'd forgotten Lena Dunham’s 27th birthday. “I found out from [my daughter] Maude, who saw it on Entertainment Tonight,” he confessed to reporters. Apatow blamed his mistake on the fact that he wasn’t invited to a party. “Maybe there was a party, and I didn’t get to go?” he joked. The 45-year-old is currently working with Dunham on Season 3 of Girls, which won a Golden Globe this year for best comedy or musical TV series.