Muse may have the official theme of the London Olympic Games, but it's beginning to feel like 'Hey Jude' may be closer to the hearts of those in attendance.

Having already closed out the Opening Ceremonies, Sir Paul McCartney and his family were on hand Saturday (Aug. 4) to watch Team Great Britain pick up the gold medal in women's cycling.

Gigwise reports that McCartney's daughter, Stella, designed all of Team GB's uniforms for the event and the McCartney clan, including Paul's new wife Nancy, were in attendance at the Velodrome to watch the women's team receive their medals.

Cameras spotted the McCartney's in the crowd, and Paul led the audience in a sing-along of the "na, na, na's" from the Beatles' 'Hey Jude' as Laura Trott, Joanna Rowsell, and Dani King received their honor.

Watch Great Britain's Women Cyclists Serenaded With 'Hey Jude'