On 9th September, SMAP celebrated their 20th debut anniversary with 10,000 fans in a special event at Seibuen Amusement Park. The amusement park is where the group had their first press conference and fan meeting, with them performing their debut single "Can't Stop!! -Loving-" in the midst of a huge typhoon and heavy downpour.
The fan meeting comprised of a Q&A session with questions from fans, an "idol game" with fans involving popping a balloon without using hands, and a performance segement. At the end of the event, SMAP shook hands with all 10,000 fans as they left the venue.
Source: Sanspo, Youtube
(I'm sorry, I couldn't resist ;P)