All over (someone) like a cheap suit phrase
Used to describe a situation in which people gather together in large numbers or filling a particular place
When the famous singer walked out of the building, the press were all over her like a cheap suit.
I guess she has a crush on him because when she sees him, she will be all over him like a cheap suit.
To cover someone or something with soap
If a person has the devil's own luck, he or she has extremely good luck.
A: Yesterday I won a $10 million lottery jackpot and today I won a car in a draw. 
B: You have the devil's own luck.