We still aren't sure if we were challenged by a caching friend's Facebook selfie and the comments it collected or if we merely interpreted it that way. In either case we picked up the ball and ran with it. A series based on '70's Super Pop songs? Why the heck not? How many could there really be out there anyway? Whatever that number is / was...now it's slightly higher. We're pretty sure you'll be cursing us for the following ear worms, but we're ok with that. We're also sure you'll have fun collecting these smilies, too. So, it's kind of a draw. 
We are making the terrain on this one a 3.5 due to the potential tight squeeze needed to get at the cache. Height and weight may be factors in retrieving this one so if you have someone in your group that is a little smaller it may be the cache to employ them for the grab.
This one is also a little bit of a silly mash-up. Some are sure to get it and have a chuckle. Others may simply think we're weird. In either case, be sure to sign the log, meow...