Answer by taking a quote from the following article:

The Wiggles are an Australian children's music group formed in Sydney, New South Wales, in 1991. The current members of the group are Anthony Field, Lachlan Gillespie, Simon Pryce, and Emma Watkins. The original members were Field, Phillip Wilcher, Murray Cook, Greg Page, and Jeff Fatt. Wilcher left the group after their first album.

The Wiggles enjoyed "almost universal approval" throughout their history. Their songs were sung and played in pre-schools all around the world. Between 2000 and 2010, The Wiggles earned 21 Gold records. According to a 2012 news release published to announce the retirement of Cook, Fatt, and Page, they earned several Platinum, Double Platinum and Multi-Platinum records, as well as sold 23 million DVDs and 7 million CDs. They performed, on average, to one million people per year.  After 2003, front-row tickets to their sold-out concerts in the US were scalped for US$500. The group responded by reducing the number of seats sold per transaction, in order to keep prices down and avoid further tickets scalping. In 2008, the group found themselves in the midst of what The Daily Telegraph called a "ticketing scandal"; scalpers tried to sell a A$19 ticket on eBay for almost A$2,000 and a set of three tickets for A$315 for concerts in Melbourne, and a group of three tickets to a Wiggles UNICEF charity concert in Sydney had a price tag of A$510. The tickets were taken off eBay and voided.  In what Paul Field called "one of the highlights of their 15 years of being together", The Wiggles were awarded an honorary doctorate degree from Australian Catholic University in 2006. Cook gave an address during the private ceremony honouring them. They were awarded another honorary doctoral degree in 2009 from their alma mater, Macquarie University. The group was named UNICEF goodwill ambassadors in 2008; they held a special concert to raise money for the organisation. In 2010, the four original members of The Wiggles were appointed Members in the Order of Australia for their service to the arts in Australia, especially children's entertainment, and for their contributions and support of several charities. They called the honour their "biggest recognition yet". The group has always invited children with special needs and their families to pre-concert "meet and greet" sessions. According to Fatt, many parents of these children have reported that The Wiggles' music has enhanced their lives, and that children with autism "respond to [The] Wiggles and nothing else". The Wiggles, throughout their history, have visited and performed for patients at the Sydney Children's Hospital every Christmas morning.  In 2011, ABC Music released an album titled Rewiggled: A Tribute to The Wiggles" to celebrate the group's 20th anniversary. The album features covers of many favourite Wiggles songs performed by notable Australian music artists.

How did the album sell?