Sabrina Carpenter is about 5 feet tall — 152 cm — based on Carpenter's own account. In a WIRED autocomplete interview, she remembered reaching five feet and said she did not think she had grown after that.
In this six-star comparison, Carpenter is the shortest person. Ariana Grande is 153 cm, Chappell Roan 157 cm, Billie Eilish 160 cm, Olivia Rodrigo 163 cm and Taylor Swift 177.8 cm. That puts Ariana only about 1 cm above Carpenter, while Swift is roughly 25.8 cm taller.
Why can the difference look inconsistent in photos? Footwear, posing, camera angle and stage blocking can all change apparent height. Public height listings also vary by a centimeter or two for some celebrities. A common scale removes those visual distortions and makes the listed differences easier to read.
The useful part is seeing what those heights mean side by side: from Carpenter and Grande at almost the same height, through Roan, Eilish and Rodrigo, to Swift at the tall end of the lineup.