What to Watch on Wednesday: Christmas in Rockefeller Center, Bruno Mars at The Apollo

Christmas in Rockefeller Center (8 p.m., NBC) – The annual tree-lighting in New York features performers Leslie Odom Jr., Pentatonix, Gwen Stefani, Brett Eldredge, Jennifer Nettles and The Tenors.

Vikings (9 p.m., History) – King Aethelwulf and his family are still in hiding in the Season 5 premiere.

American Housewife (9:30 p.m., ABC) – Katie and Oliver bribe rich Westport families to donate big-ticket items to for the spring gala.

Bruno Mars: 24K Magic Live at the Apollo (10 p.m., CBS) – Mars performs live at the Apollo Theater in New York.

Martha & Snoop’s Potluck Dinner Party (10 p.m., VH1) – Kelly Rowland and George Lopez join Martha and Snoop for “Taco Tongueday.”