Beyonce’s surrogate has reportedly given birth to a baby girl in New York, according to reliable sources. The NY Daily News reports that Beyonce, wearing a bad wig and heavy makeup, checked into an upper East Side hospital on Saturday.

But our source inside the hospital confirmed that another woman — Beyonce’s surrogate, Ingrid Jackson, was also admitted to Lenox Hill’s maternity ward under tight security Saturday morning.

Our hospital source confirmed that Jackson gave birth to a healthy baby girl Saturday afternoon. The source dismissed “absurd” rumors that Beyonce and her rapper husband Jay Z rented out an entire floor at the hospital for $1.3 million.

“We don’t have entire floors sitting empty at Lenox Hill,” scoffed the source.

Just moments ago, troubled singer Rihanna tweeted, “Welcome to the world princess Carter! Love Aunty Rih”. But Sandrarose.com readers have affectionately dubbed the child “Pillow Carter”.

In an effort to keep unauthorized images from leaking to Twitter.com, hospital workers placed tape over security cameras — which should make it easy for Beyonce’s Stans to sneak onto the floor.

And hospital employees are forced to turn in cell phones when they arrive for their shifts, the source told the NY Daily News.

The baby is the first for Beyonce, 30, and the second for aging rapper Jay Z, 43, whose son, Isa Jael, 9, lives with his mother, former video model Shenelle Scott on the island of Trinidad.

Lenox Hill hospital is also the birthplace of pop star Lady Gaga.

Update: According to E! Online, the baby’s name is Ivy Blue Carter.

Update II: According to numerous sources, the baby’s name is Blue Ivy Carter, presumably named after Jay Z’s Blueprint album and Beyonce’s most recent album ‘4’ (IV is the Roman numeral symbol for the number 4).