Overrated vs. Underestimated — What's the Difference?

"Overrated" is a song by English singer Siobhán Donaghy, released as the lead single from her debut studio album Revolution in Me (2003). It was released two years after her controversial departure from girl group the Sugababes.

To make too low an estimate of the quantity, degree, or worth of

To overestimate the merits of; rate too highly.

To consider (someone) to be less capable or effective than is actually the case

Given an undue amount of credit for quality or merit in a field; not necessarily related to popularity.

An estimate that is or proves to be too low.

Simple past tense and past participle of overrate

Simple past tense and past participle of underestimate