Alvin & Brittany

Alvin and Brittany in CGI

This page covers evidence indicating a coupling of Alvin Seville and Brittany Miller.

Evidence

In Hooping It Up, though it may have been only because he wanted his hula hoop back, Alvin has come to Brittany's rescue, during which time the song 'My Boyfriend's Back' is being sung.
Alvin dances with Brittany in Alvin and the Chipmunks Meet the Wolfman.
In the teaser trailer for Alvin and the Chipmunks: The Squeakquel, they first met in school and Alvin falls in love with her.
In a TV trailer for Alvin and the Chipmunks: The Squeakquel, Alvin hits on Brittany when she's getting her lunch by saying "How about a side order of me?" but Brittany says "No, thanks" and three boys on another table laugh at Alvin, who smiles sheepishly.

She shows much affection for Alvin in I Love the Chipmunks Valentine.
Brittany dances with Alvin in Alvin and the Chipmunks Meet the Wolfman.
In many "The Chipmunks Go to the Movies" episodes, Brittany is either saved, dating, or is a partner of Alvin's.
In the 4th trailer, Brittany stands on her lunch tray and says to Alvin, "We are, SO going to destroy those Chipmunks!" revealing she is competitive like Alvin. Alvin replies back by kicking the tray off the table and onto the floor. Everyone laughs but Brittany is not amused.
In a new clip for Alvin and the Chipmunks: The Squeakquel, after Jeanette and Eleanor say they love Simon and Theodore, she says to them, "Yeah, I know. But, guys, remember what Ian said? We can't trust them." hinting she has a crush on Alvin, but isn't sure whether to trust him or not.

Alvin and Brittany both show extreme concern for their siblings.
Brittany's signature color is pink while Alvin's color is red which shows that Brittany is like a female version of him.
Brittany shows similarities in fame and fortune as Alvin, and Alvin shows a love in singing musical numbers with his siblings as Brittany does.
In the TV series and the movies, they are both competitive and love to win.
Both Alvin and Brittany are often "overbearing".

Brittany is slightly more narcissistic than Alvin (an example for Alvin is when he gave his harmonica to a sick boy in the Christmas special were as Brittany has never been documented to do any similar acts of mercy).