"Her Diamonds" is the lead single from Rob Thomas's second studio album Cradlesong. Thomas confirmed the single's release via a Twitter account he had created on March 11, 2009. The single premiered on April 22, preceding the release of Cradlesong on June 30. On July 3, 2009, Thomas confirmed in an interview with Natalie Morales and Lester Holt on NBC's Today show that the song references his wife Marisol's auto-immune disease. Thomas announced his wife sang backup on the track and also helped produce its arrangement.

The music video for the song was directed by Dave Meyers and the video as well as behind the scenes can be seen on Rob Thomas's official website.

The video premiered on May 12, 2009 on VH1.com. The video features American actress Alicia Silverstone. The video starts with scenes of a blue, icy, background. In this background (which is actually ice) reflections of Thomas singing are shown. Later, the video shows Silverstone completely trapped in ice and motionless sitting on a bed in a room. The sun shining through the window melts the ice until Silverstone is shown shivering. She falls to the floor, still shivering. Later, more scenes of Thomas singing are shown, and the video ends with Silverstone gazing out the window at the rising sun. The video reached number one on both Billboard's hot videoclips chart and VH1's top 20 countdown.

Visual effects for the video were created by Baked FX.

On the Billboard Hot 100 the song reached #23, his highest peak since 2005's hit "Lonely No More".

On the Adult Top 40 radio airplay chart, "Her Diamonds" debuted at number 27. The track would go on to top the Billboard Hot Adult Top 40 Tracks chart the week of August 8, becoming Thomas' third #1 to date and extending Thomas' streak of top-five singles as a solo artist on the format to six (seven if including "Smooth", his collaboration with Santana.)

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Wikipedia