Since Christina Aguilera's arrest a couple of days ago, everyone has been talking about the starlet's downward spiral, including fellow songstress Pink. Pink has never been shy about her rebellious past or her sometimes brutally honest attitude; therefore, it didn't really come as a surprise when Pink cracked a joke about the 'Genie in a Bottle' singer's run-in with the law.

Yesterday, Pink tweeted the following message: "Out of Myself, Britney, and Christina- didn't everyone think I was gonna be the troublemaker? LOOK MA!!! No CUFFS!!!"

Spanning back to her first days of pop stardom, Pink has always been open about her troubled teenage years. Pink's parents used to fight a lot, and the singer used to deal with her pain by staying out all night partying and experimenting with drugs. She is also a very rebellious singer, addressing controversial issues in her songs and videos like self-mutilation, domestic abuse, drug use and body image.

This comment is not the first time Pink has spoken about Christina Aguilera in a negative light. When Pink's 'Behind the Music' aired on VH1 a few years ago, the singer spoke about Aguilera's diva-like behavior during the recording of 'Lady Marmalade.'

"[A&R exec]Ron Fair walked in. He didn't say 'Hi' to any of us and said, 'What's the high part? What's the most singing part? Christina is going to take that part,'" Pink said in the VH1 documentary. "And I stood up and said, 'Hi! How are you? So nice of you to introduce yourself. I'm Pink. She will not be taking that part -- I think that's what the f----n meeting is about.'"

Nowadays, Pink is enjoying her life to the fullest. She is happily married and settled down with her husband, Carey Hart. In November 2010, the couple announced that they are expecting their first child. Aguilera, who is also a mother, recently divorced her husband and is dating her boyfriend, Matthew Rutler, whom she was arrested with.