Friends and family say 40year-old Melissa Houston wore tutus and tiaras because she liked to make people happy. But she also loved pushing people to be their best.On Sunday, a group of triathletes tied on their tutus and grabbed their wands to honor Houston."If somebody needed help she could have been on world-record pace if there was somebody on the course that needed help, she was going to stop and she was going to help them," said James Sheremeta, Houston's coach.Jason Webber, Houston's best friend, added, "She meant the world to me She loved seeing people do things that they didn't think they could do."Houston's affect on others is what friends and family say made her a great coach for Team In Training, a group that supports the Leukemia & Lymphoma Society."People say they never have enough time, and she always made the time. Sleep was literally the thing that always gave out," said Webber.Webber was the last person to see Houston on Thursday night."It's the most amazing thing that I could possibly have ever wanted was my last memory is of this amazing, amazing dinner with the most hilarious stories and the best conversation and just chatting and chatting and chatting," said Webber.According to the California Highway Patrol, Houston was driving her minivan about 85 mph on northbound state Route 163 when she crashed into a semitruck that had slowed down for construction cones.Houston died instantly, authorities said."Emptiness; I'm empty ," said Webber.But Webber knows his personal best is because of Houston."When I set certain goals, she would push it and say, 'Why is that where you stop? You can do better," said Webber.Houston leaves behind a husband and two daughters, ages 6 and 8.