The song "I'm Back, Baby" is a collaboration between The Gregory Brothers and Markiplier. Markiplier, whose real name is Mark Edward Fischbach, is a popular YouTuber known for his gameplay commentary and comedic videos. The Gregory Brothers are a musical group known for their "songify" videos where they turn viral moments and speeches into catchy songs. In "I'm Back, Baby," the lyrics express Markiplier's confidence and determination to overcome past challenges and make a comeback. He acknowledges that he has been through difficult times but is ready to face them head-on. The song reflects Markiplier's gratitude for the support he has received and his optimistic outlook for the future. The lyrics also touch upon the theme of intelligence and personal growth. Markiplier refers to himself as "smart" and emphasizes the importance of his brain always working and leading him to success. He questions whether he has become taller metaphorically and feels empowered as he navigates through life. The chorus of the song emphasizes Markiplier's excitement and enthusiasm for the present moment. He declares that he is back, on a roll, and out of control, showcasing his energy and commitment to his goals. Towards the end of the song, there is a mention of a dance called "the dinosaur." It is likely a playful reference to an online trend or inside joke among Markiplier's fans. Overall, the song "I'm Back, Baby" is an upbeat and empowering anthem that celebrates Markiplier's resilience, growth, and readiness to face new challenges. It captures his positive mindset and determination to overcome adversity.