The singer, who is originally from Allerton, was back visiting family after finding fame on one of the world’s biggest shows.
She took a well-earned break before hitting the recording studio and visited her old school, St Austin’s Primary School, in Grassendale.
Excited pupils erupted into applause as she entered the hall and clapped along to her rendition of Adele’s Rolling In The Deep.
Hollie, who made the top 10 after a second attempt, also took part in an inspirational question and answer session with the children and met some of her old teachers.
She told the ECHO: “As soon as I walked in, I said it smelt the exact same.
“I remember I would always go to my best friend Jess’s class to read stories and I would always be really quiet to get extra milk.”
Hollie, who celebrated her 19th birthday on the Idol tour in Detroit, was joined by her childhood pal Jessica Holmes, 19, and mum Lorraine, who worked in the kitchen at the school for five years. Hollie said she was enjoying the shopping, English breakfasts and sausage rolls.
She said: “When my dad’s screaming at the TV, I know there’s a Liverpool game on and we always go to the Liverpool shop when we’re back here.
“We had a family party in Liverpool. I was excited to see everyone because I hadn’t seen them since the start of Idol.
“Where I live in McKinney, in Texas, I get noticed every time I go out. It’s not too bad but it is nice to just be back in Liverpool with my family and go to the bingo with my nan and see Jess 24/7.”
Source: Liverpool Echo