Well yes. Who else but Xena was ahead of the curve when it comes to breaking new ground with the first scifi Musical than Rob Tapert and Co. It wasn't Josh Whedon who pioneered the SciFi Musical. While people think it's Buffy - it's Xena who pioneered a lot of things and Buffy followed. Xena does NOT get the credit it deserves and Buffy steals her thunder which is a real shame. Don't get me started on Buffy Vs Xena or else this post could be THOUSANDS of words rather than a few paragraphs.
Anyhoo...SyFyWire had a whole article and video about Xena's awesome musical The Bitter Suite (the fans actually created a parody of it called The Bitter Treat. It's somewhere in the Xenaverse - gosh I wish someone would post it).
The past 20 years have seen an unusual trend on TV in which a series would feature a very special musical episode. What better place to explain characters bursting into spontaneous (yet intricate) numbers of song and dance than genre TV, where spells, technology, trickster demons, and supervillains can justify having the whole cast suddenly being in, well, a musical?
SYFY WIRE's Dany Roth takes a look at this particular sub-genre, revealing which TV show was the very first to start the whole trend. While you might think it all began with Buffy the Vampire Slayer's excellent "Once More, with Feeling," it was actually another badass female character who "planted the flag" into the musical episode genre three years earlier on Feb. 2, 1998: Xena: Warrior Princess.
Created by Rob Tapert, Xena: Warrior Princess aired for six seasons between 1995 and 2001. "The Bitter Suite" was the twelfth episode of the show's third season, which earned two Emmy Awards nominations for Best Song: one for regular series composer Joseph LoDuca for "The Love of Your Love," and the other for LoDuca and Dennis Spiegel for "Hearts Are Hurting." "The Bitter Suite" proved to be so successful that Xena would return to the musical genre two years later in the Season 5 episode "Lyre, Lyre, Hearts on Fire."