Rudd and Liberal minister Joe Hockey decided to end their regular weekly appearances on the program. In a March 2008 episode Koch and Doyle were ambushed by a group of protesters chanting and carrying placards that claimed "Channel 7 doesn't pay", a reference to controversy surrounding the reported non-payment of winnings to National Bingo Night audience members and home viewers. The group, posing as fans of guest Keith Urban, were moved away by security. Koch later blamed the incident on the Nine Network's A Current Affair, a theory that was lent credence when the same protesters appeared on that night's episode of the program. Both Koch and co-host Melissa Doyle promised to look into their allegations but later simply read a statement from the network. In April 2010, a scheduled concert for Canadian teen singer Justin Bieber, at Circular Quay, Sydney, was cancelled at 5:00 am by order of police after the crowd of more than 5,000 people (mainly teenage girls) had begun a crowd crush and were ignoring the orders of the crowd controllers. Eight people were taken to hospital for their injuries and others suffered from hyperventilation. The concert was then moved to the Sunrise studios at Martin Place. Sunrise had been promoting the concert for two weeks beforehand, creating a significant amount of excitement and anticipation. It was also alleged that Bieber swore at a floor manager but was reassured by Bieber's regular sound technician that "he tells us that all the time". Bieber, however, has denied this, publicly denouncing the claims as "lies and rumors" spread by "adults". In March 2015, Armytage was accused of racism in an on-air interview on the programme, after congratulating a woman for looking whiter than her twin. After an online petition was signed by over 2,000 people calling for her to apologise, she did so. In February 2016, actress Kristen Davis appeared on the show to discuss her work with the United Nations High Commissioner for Refugees in which she also reluctantly took part in a Sex and The City themed skit which was received poorly by viewers. On Twitter Davis expressed her annoyance that Sunrise focused on her role in Sex and The City instead of her work with the UNHCR, and the incident led to Armytage, who was meant to MC and conduct an interview with Davis at a UNHCR event in Sydney, being disinvited to the event.