Lithium. 
Song lyrics, Nevermind (1991) 
Variant: I'm so happy
'Cause today I found my friends
They're in my head.
I'm so ugly, that's okay
'Cause so are you,
Broke our mirrors. 
Source: Nirvana
                                    
“So spread the word cause I'm promoting my past until I'm passed out.”
            "Rhyme or Reason" 
2010s, The Marshall Mathers LP 2 (2013)
        
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Eminem 140
American rapper and actor 1972Related quotes
                                        
                                        Saturday as Usual 
A Collection of Songs Written and Recorded 1995-1997 (1998)
                                    
                                
                                    “I'm living in the future so the present is my past.
My presence is a present, kiss my ass.”
                                
                                
                                
                                
                            
                                        
                                        Monster 
Lyrics, My Beautiful Dark Twisted Fantasy (2010)
                                    
                                
                                    “I'm so happy. Cause today I found my friends.
They're in my head.”
                                
                                
                                
                                
                            
Source: Artwork.
                                        
                                        Cryin' for Me. 
Song lyrics, American Ride (2009)
                                    
“the earth is not my home, I'm just passing by”
“I'm sick. It's passed down through my family. I am an addict. I'm sick.”
                                        
                                        Regarding his meth addiction 
[liveDaily, http://www.livedaily.com/news/5529.html, Interview: Travis Meeks of Days of the New, 2003-09-24]