Italian astronaut Luca Parmitano talks about the recent spacewalk that was cut short because his helmet had a water leak inside it.
U.S. astronaut Chris Cassidy, who was on the spacewalk with Parmitano, explains how the leak happened in more detail
The stars are sending their messages of love and support to the south African icon
The 95-year-old had been receiving medical treatment for a recurring lung infection at his home
Find out which songs made the list!