An estimated 40,000 Christians have crammed into London's Excel...
Can you remember what your biggest concerns were when you were young, or did you take each day as it came and didn't worry about anything?
According to survey results, giving, mentorship and finding a spouse are the key concerns for Christian young adults today (aged between 18-37).
Steve Clifford is general director of the Evangelical Alliance - the organisation behind the report. He spoke to John Pantry about what the survey revealed.