She then concluded, "So I'm sorry, Allison." Williams starts jamming out to ... thing brought back to life — Chapman's original "Fast Car" rocketed to No. 1 on the iTunes chart shortly afterward ...

Lena Dunham Apologizes for Making Allison Williams Sing 'Fast Car' on Girls: 'It's Not Going to Be a Big Deal' Allison Williams Says Her Son Was 'Trying to Tell Us So Much' as a Newborn ...