Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Couple | Style | Music | Choreographer(s) | Chosen by |
| --- | --- | --- | --- | --- |
| Katee Shean Joshua Allen | Bollywood | "Dhoom Taana" from Om Shanti Om | Nakul Dev Mahajan | Nigel Lythgoe |
| Courtney Galiano Gev Manoukian | Rumba | " Wishing on a Star "— Rose Royce | Tony Meredith Melanie LaPatin assisting | Mary Murphy |
| Comfort Fedoke Stephen "Twitch" Boss | Hip-Hop | " Forever "— Chris Brown | Dave Scott | Adam Shankman |
| Chelsie Hightower Mark Kanemura | Lyrical hip-hop | " Bleeding Love "— Leona Lewis | Tabitha and Napoleon D'umo | Lil' C |
| Katee Shean William Wingfield | Pas de deux | " Imagine "— David Archuleta | Dwight Rhoden Desmond Richardson | Mia Michaels |
| Courtney Galiano Mark Kanemura | Jazz | "The Garden"— Mirah | Sonya Tayeh | Adam Shankman |
| Katee Shean Stephen "Twitch" Boss | Contemporary | " Mercy "— Duffy | Mia Michaels | Mary Murphy |
| Kherington Payne Stephen "Twitch" Boss | Viennese Waltz | " A New Day Has Come "— Celine Dion | Jean-Marc Généreux France Mousseau assisting | Debbie Allen |
| Katee Shean Joshua Allen | Lyrical hip-hop | " No Air "— Jordin Sparks & Chris Brown | Tabitha and Napoleon D'umo | Nigel Lythgoe |
Question:
What is Chosen By, when Couple is Katee Shean Joshua Allen, and when Choreographer(s) is Nakul Dev Mahajan?
Answer:
Nigel Lythgoe