How many letters does the top answer for “album by trainor” have?

The most common answer is thankyou (8 letters).

Crossword clue: album by trainor

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

thankyou 8 letters wd-fact-v3

title 5 letters wd-fact-v3

a heading that names a statute or legislative bill; may give a brief summary of the matters it deals with

album by that 50% similar → beautifulworld, everythingchanges, nobodyelse

album by who 50% similar → aquickone, endlesswire, facedances