"Sunday Best" is a song by Australian musician Washington, released in August 2010 as the lead single from her debut studio album, I Believe You Liar.

The music video was released on YouTube 27 July 2010.

It consists of Washington and two bandmates in a restaurant, beginning with French dialogue and then progressing to a musical like scene.

The clip contains references to French New Wave cinema, and is filmed in that style.

The music video also features Michael Tomlinson of the band Yves Klein Blue.