The 10-year-old had a hero's welcome at Oakhill College, Whalley, near Clitheroe, yesterday but then it was straight back to lessons.
Hollie, from Huncoat, near Accrington, broke down in tears in front of a live TV audience during Friday's semi-final and her stage ordeal has raised questions about the pressures faced by child performers on the show.
But mum Nina, 37, said Hollie was determined to go on stage for the final and proved she had recovered her nerve by delivering a flawless performance on Saturday night.
A spokeswoman for Oakhill said: "We are absolutely delighted Hollie is back with us in the classroom.
"We are very proud of what she has achieved throughout the performance."
Ballerina Hollie sang Wishing You Were Somewhere Here Again from Phantom Of The Opera in Saturday night's final and was hailed by the judges, although she not eventually voted into the top three by the viewing public.
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Grey Flag, manchester (02/06/2009 at 08:53)
so brave, well done for singing a song and then going back to school
brilliant.....great, back to school
love ya hollie