Has Olivia Newton John recorded "Summertime"

All Music Guide indicates that she has recorded this song on a 2004 release titled "Indigo: Women of Song" which is apparently an Australian release. I am going to try to attach a link to All Music Guide but I am not sure if it will work.

http://www.allmusic.com/cg/amg.dll?p=amg&token=ADFEAEE57B1DDB4AAF7420CD9A3E50CCA153FF08D74FF3801F34454792B63E4591187EE048F08498FDFF6AB671B0FD2EA45F43D2C8E452FCD6663C2DED93&sql=33:amdgynm1xpsb