BRITNEY SPEARS slurps down booze, pills & junk food to fight depression, The ENQUIRER has learned.

As Britney Spears' new album has zoomed up the charts, her weight has soared to a new high!

The Femme Fatale charttopper is packing her newly upsized body into skimpy concert costumes after putting on a whopping 30 pounds due to depression, medications, drinking and junk food.

In just the last six months, the 5-foot-5 singer has gone from 118 pounds to nearly 150, her heaviest ever, say sources.

The 29-year-old star's pudgy physique was obvious during a recent concert in Las Vegas, and appearances on "Good Morning America" and "Jimmy Kimmel Live," Britney's costumes strained to hide her bulges.

Those close to the superstar performer say her rapid weight gain is likely caused by medications she takes.

"I think her meds probably keep her focused and under control, but they increase her appetite and pile on the pounds," said a source.

According to the source, Britney's depression has escalated in the last six or seven months and she drinks alcohol and eats junk food to cope, gorging on burgers and tacos, high-sugar sodas, chips and blended coffee drinks.

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