VIDEO : David Bowie's Son Criticizes Lady Gaga Grammy Awards Tribute

During the Grammy Awards on Monday night, Lady Gaga's tribute to the late David Bowie received mixed reviews from his fans, and even his family. Shortly after the performance, David Bowie's son, Duncan Jones, fired off a somewhat cryptic tweet, writing, "Overexcited or irrational, typically as a result of infatuation or excessive enthusiasm; mentally confused.