Cancers are very sensitive about their feelings and personalities. they can switch from one emotion to another anytime or day. but what really matters is their kindness and support to other signs.
Rick Astley is an Aquarius, but he can relate to some Cancers because he is too shy and overprotective with certain things such as his meme, his Identity and feelings. speaking of emotions, he could be seen crying to himself silently because he gets anxiety of being alone due to being more of an Extrovert. Rick can also get a bit angry as he would be told "no". Other than this, he is gentle and nice to his fans (mostly, rickrollers) and is never gonna give up anything.