Celebrity charity efforts can be easy to disregard merely as publicity stunts, but you have to give credit for Kenna, Jessica Biel and Emile Hirsch for their latest effort to raise awareness for clean water in Africa. On tuesday, the group of musicians and actors, accompanied by a team of scientists and activists (including Alexandra Cousteau, Jacques Cousteau's granddaughter) reached the top of Mt. Kilimanjaro after a 6-day hike and 19,340-foot elevation gain. While climbing Kili, Africa's highest peak and one of Tanzania's main travel destinations is not considered an experts-only trek with an approximate success rate of 75%, it most certainly is a challenging one. The celebrity group reached the Kilimanjaro peak without serious complications, but encountered harsh weather conditions such as rain, snow, strong winds and even hail.