According to Official Guinness Records,
The highest basket toss involved four bases tossing a flyer to a height of 5.50 m (18 ft) and was achieved by members of the Australian All Star Cheerleading Federation (Australia) on the set of a CCTV Guinness World Records special, in Beijing, China, on 3 September 2013. Read more: Classics - Highest cheerleading basket toss
For a complete list of 2013 records, please visit 2013 Guinness Records in China.