I was on IMDB and there have been more episode titles that have been added to the season 5 episode list page.
And there was 2 episodes that were called
Season 5, Episode 8: The Sirenix Song
What do you guys think?...
And also the IMDB page is giving out legit information because it was confirmed that the episode titles are correct by Molly herself on Facebook. :)
Hey guys turns out that Sirenix is the new transformation because Molly has confirmed it on Facebook!
Thanks to WinxForever