Leighton was interviewed by Jimmy Fallon, ironically the friend standing with her at Prince's concert at New York's Madison Square Garden when the pop superstar pulled the actress onstage and sang her a song.
'I couldn't hold my cup afterwards, I was breathing so heavy,' Meester said, indicating how her hands were also shaking.
The star, who admits she has clung on to a towel Prince gave her, says it has set a high standard for future Prince shows she may attend. 'I don't feel like I can go again unless I can get serenaded,' she joked.