Player of the Match Alana King proved the catalyst for the semi-final triumph as the leg spinner claimed 3/16 off four overs, taking key Scorchers wickets.
In the run chase, Nat Sciver helped guide the stars home with an unbeaten 47 off 45 balls after taking 1/27 with the ball.
Winning the toss and electing to bowl, Katherine Brunt and Sciver were at their restrictive best, limiting the Scorchers to just 32 runs after the powerplay.
The next ball, King was brought into the attack.
The spinner immediately found the pads of Player of the Tournament, Sophie Devine, caught in front sweeping.
With a confident appeal, the umpire had no hesitation raising the finger, confirming a plumb LBW dismissal.
King’s second over brought her second wicket, forcing Amy Jones to sky an attempted drive into the hands of Erin Osborne at mid-off.
An over later, Osborne — desperate not to give up a single off her own bowling — charged down the pitch, picked up the ball and cast it at the stumps mid-dive, causing a spectacular run-out.
King’s third wicket soon followed as Beth Mooney drove to straight to mid-off, where Sciver took a simple catch to put the Scorchers firmly on the back foot at 4/51.
A Sciver LBW, a Sophie Day-Nicole Faultam stumping, two runouts, and another 10 overs later, the Stars limited the Scorchers to 8/125 after 20.
In the chase for a spot in the WBBL06 Final, Elyse Villani looked to take pressure off the Stars early with three fours and a six within the first two overs.
But she was soon caught for 18 off 10, before gun batter Mignon du Preez was bowled as the Scorchers tried to keep in the contest.
All-rounder Sciver joined captain Meg Lanning at the crease and the pair combined for a steady partnership of 40.
But Lanning was then bowled for 22 off 15, leaving young gun Annabel Sutherland with the reliable Sciver to take the run chase reigns.
The pair were untroubled, putting on an unbeaten partnership of 67 — Sutherland with an impressive 30 off 26 — to guide the Stars into the decider.
And after five years without success, the Stars will be relishing the opportunity to take out the tournament.
“[Success] has come this year, we finished on top of the table in the round games, and now through to the final, it’s unbelievable,” Alana King said post-match.
“You can’t wipe this smile off my face.”
Now, all eyes will be on tomorrow night’s semi-final, where the Heat play the Thunder to determine the Stars’ opposition on Saturday night.
The Stars will back themselves to beat either side.
“I don’t think we’ll be too bothered on who gets through,” said King.
“They’re two really good teams, but we’ll focus on us and hopefully we get the job done on Saturday night.”