It's a free show in Vegas. After 7PM, the show runs every 15 minutes; it's very easy to stop and catch a song or two when you're walking down the strip. It brings back childhood memories of the Sentosa Island musical fountains in Singapore in the 80s and 90s (yes, I'm old).
I've been stopping here on every trip to Vegas over the past 15 years, and I've noticed that depending on the song, the fountains' "performance" can be hit or miss. The finest I've experienced was Andrea Bocelli's Time To Say Goodbye. I have to admit that I found the fountain choreography to Celine Dion's My Heart Will Go On pretty impressive too.
Bonus points for drunk women singing along!