Question: An Evening with Olivia Newton-John was which number concert tour by Australian singer Olivia Newton-John, the second leg began only in February 2009, with the opening concert having Barry Gibb  as special guest on some songs?
Sentence (from "Barry Gibb"): Barry Alan Crompton Gibb, {'1': ", '2': ", '3': ", '4': "} (born 1 September 1946) is a singer, songwriter, musician, and record producer who rose to worldwide fame as a co-founder of the group Bee Gees, one of the most commercially successful and critically acclaimed groups in the history of popular music, with his brothers, Robin and Maurice Gibb.
Relevant evidence: Yes