In 2007–2008 all of the Osmonds went on a tour of Europe to celebrate the fiftieth anniversary of their career in show business. A special televised concert in Las Vegas (the only tour stop in the US), commemorating the anniversary, aired on US PBS stations on March 10, 2008. Alan played piano with the orchestra for most of the show and Virl and Tom provided signed lyrics for two songs. The Osmonds' long-time friend and mentor Andy Williams made a surprise appearance, reminiscing about how his father had told him to put the brothers on his variety show.