Last 2 To Get

[trixie11]

Answers contain either the word sun, moon or star

16) to agitate uselessly - make a futile gesture

20) innocently idealistic, radiant, out of touch with reality

wondered if no 20 could be 'tuned to the moon'

[ubasses]

20 starry eyed

[factor-fiction]

16) Someone mentioned Black Sabbath before. Ozzy Osborne sang a song that would answer 16.

[Psybbo]

20 starstruck?

[Mojo-Jo-Jo]

16 bark at the moon?

[factor-fiction]

...BARK at the MOON

[factor-fiction]

For those who prefer Rock to the current Brit Award type music

http://www.youtube.com/watch?v=44DqUFS2W3Q

[mallyh]

bay at the moon

[emmie]

i always thought it was bay at the moon...

[trixie11]

Thanks everyone

[factor-fiction]

Both versions (bark and bay) seem to appear in lists of idioms