Two theme songs

Theme song for "How I met your Mother"
Group : "The Solids"
Song : "Hey Beautiful"

For the full album, the theme song clip starts at 3:08.
Details here: http://www.howimetyourblog.com/theme-song/

Youtube link : http://www.youtube.com/watch?v=SowWTahdb8Y
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Theme song for "Big Bang Theory"
Group : "Barenaked ladies"
Song : "Big Bang Theory Theme"

Show Page from Wikipedia :
http://en.wikipedia.org/wiki/The_Big_Bang_Theory_(TV_series)

Youtube link: http://www.youtube.com/watch?v=Aym8_S3BXKw