While the decision was initially rumored to be an attempt to re-ignite a rivalry between the ladies, and steal the thunder from Brit's reality television debut, Xtina is once again speaking out on the matter, and is insistent that there is no bad blood between the pop stars!
This should definitely be a fun game of polo to watch!
Next month, England's most famous brothers Prince William and Prince Harry will face off against each other as they compete for the Sentebale Polo Cup on June 12.
There is more than just royal rivalry on the line too!
Harry is playing for a team representing his charity Sentebale, which aids young people in the southern African kingdom, while William is playing for Tusk Trust, which protects Africa's endangered wildlife.