all singing, all dancing

From the advertising posters used to promote the 1929 film The Broadway Melody – Hollywood’s first all-talking musical (as opposed to partially talking, partially silent) – which proclaimed the film to be “All Talking All Singing All Dancing” – see film poster.[1] In full, the poster reads:

all singing, all dancing (not comparable)

1. Having many features, options or extras; sometimes used ironically to imply that the added features are just gimmicks.
   • 2020 July 29, Christian Wolmar, “Why this crisis calls for a railway crusade like no other”, in Rail, page 44:

     This is why we need a major relaunch of the railways. Not some half-hearted campaign such as "Britain runs on rail", but an all out, all-singing, all-dancing campaign to get people to use the railways again: to rediscover the benefits of train travel and learn to trust them once again.

• all-singing, all-dancing; all-singing-and-dancing

• bells and whistles

• “all-singing, all-dancing”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.