It is understood that manager Arsène Wenger and playmaker Santi Cazorla also attended the launch, along with 100m world record holder Usain Bolt.
In fairness to Christie, Arsenal's record-breaking kit deal with Puma was already one of the worst-kept secrets in football. News that the pair had agreed a five-year contract worth £30 million per year first leaked out at the end of last season, a full year before the club's existing agreement with Nike was due to expire.
The Puma deal could be the most lucrative in British football history and is expected to be formally confirmed early in the new year.
Arsenal have been with Nike since 1994 but defected to Puma, which wants to make Arsenal its flagship football team. Nike is also the kit supplier to Manchester United under a 15-year contract worth £287 million. Its present deal with Arsenal is worth £55 million over seven years.
This summer saw Chelsea sign the biggest kit deal in Premier League history after they agreed a 10-year contract with adidas to the tune of £300 million.
Real Madrid have the most lucrative shirt deal in club football, also with Adidas, the Spanish giants having agreed an eight-year contract worth £31 million per year, £248 million in total.