At U2's show in Seattle on Saturday, Space Shuttle Endeavour Commander Mark Kelly paid tribute to his wife, Congresswoman Gabrielle Giffords, in a video from the International Space Station during the introduction of 'Beautiful Day.'

Kelly appeared on the giant video screen, saying "Hello Seattle, from the International Space Station." He then proceeded to hold up a series of inspirational words that floated around him. He ended the clip by speaking a line from David Bowie's 'Space Oddity': "Tell my wife I love her very much, she knows."

Prior to Kelly's video message, Bono had dedicated the song to the astronaut's wife, Gabrielle Giffords, the Arizona congresswoman who was severely injured in an assassinated attempt earlier this year. The U2 singer introduced Kelly's video with the words, "Imagine a man looking down on us from 200 miles up. Looking down at our beautiful crowded planet."

The performance of 'Beautiful Day' featured additional footage of Commander Kelly reciting lines from the song, as well as an ad lib of 'Space Oddity' by Bono.

Watch Commander Mark Kelly's Video Message at U2's Seattle Show

Watch U2's Full Performance of "Beautiful Day" in Seattle