Complete the sentences using the correct forms of the adjectives.

Choose the correct option.

This song by Beyoncé was [more popular|the most popular] than that song by Britney Spears.
The program guide is [least interesting|less interesting] than a TV programme app.
The soundtrack to this film was [the loudest|louder] that I've ever heard.
The tickets were [cheaper|more cheapest] than I expected.