The first number-one hit on the chart in 2012 was Michel Teló's "Ai se eu te pego!
[1] Artists and acts that had or were featured in at least one song that topped the Mega Single Top 100 that year for at least one week were Michel Teló, Chris Hordijk, Joan Franka, Triggerfinger, Gusttavo Lima, Jan Smit, Gerard Joling, René Froger, Nick & Simon, Asaf Avidan, Sandra van Nieuwland, PSY, Adele, Roos van Erkel, Robbie Williams, Leona Philippo, will.i.am and Britney Spears.
[1] Out of these acts, eleven of them, Michel Teló, Chris Hordijk, Joan Franka, Triggerfinger, Gusttavo Lima, Asaf Avidan, Sandra van Nieuwland, Psy, Roos van Erkel, Leona Philippo and will.i.am, achieved their first number-one single on the chart that year, either as lead or featured artist.
Sandra van Nieuwland had the most number one hits, achieving five singles that topped.
18 singles that topped the chart in 2012 were solo songs, while three others were collaborations.