Mercedes in the Morning's 2 Truths 1 Lie: The “Chilean Guest” One

Every Wednesday at 6:30 AM, Mercedes, J.C., and Steph play “Two Truths and A Lie”.  Two people are telling the truth and one person is lying! Find out who the big fat liar is!
Mercedes in the Morning's 2 Truths 1 Lie: The “Chilean Guest” One
Photo credit Steph

Who is the LIAR here? Is it..
Mercedes’ used to be a math tutor
JC had someone from Chile live with him
Steph missed Ariana Grande at Coachella

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Featured Image Photo Credit: Steph