So simple you will kick yourself.
Right before the finish line go down to the left, jump across to the wall and wall jump to the teleporter. When you come out at the other side up at the top. Head to the left but don't drop down. You will see some sparkles in the air, these are invisible platforms which are easy to jump across to. Once you have navigated the floating invisible platforms you can jump across to another teleporter, when you enter, don't press any direction and it will drop you out of the floating platform right above the two stars.